SG6848x1 Datasheet. Www.s manuals.com. R1.3 System General

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

FEATURES

 Green-mode PWM Controller

 Low Start-up Current (5uA)

 Low Operating Current (3mA)

 Programmable PWM Frequency

 Peak-current-mode Operation

 Leading-edge Blanking

 Built-in Synchronized Slope Compensation

 Cycle-by-cycle Current Limiting

 Constant Output Power Limit

 Gate Output Voltage Clamped at 15V

 Small SOT-26 Package Available

APPLICATIONS

General-purpose switching mode power supplies and

flyback power converters, such as

 Battery chargers

 Power adapters

 Open-frame SMPS

 Replacements for linear transformers and RCC

 5V standby power for PC power supply.

DESCRIPTION

This highly integrated PWM controller provides

several special enhancements designed to meet the low

standby-power needs of low-power SMPS. To

minimize standby power consumption, the proprietary

green-mode function provides off-time modulation to

continuously decrease PWM frequency under light-load

conditions. This green-mode function enables the power

supply to easily meet even the strictest power

conservation requirements.

The BiCMOS fabrication process enables reducing

the start-up current to 5uA, and the operating current to

3mA. As a result, a large start-up resistance can be used.

Built-in synchronized slope compensation ensures the

stability of peak-current-mode control. Proprietary

internal compensation provides a constant output power

limit over a universal AC input range (90VAC to

264VAC). Cycle-by-cycle current limiting ensures safe

operation during short-circuits.

To protect the external power MOSFET from being

damaged by supply over voltage, the SG6848x1’s output

driver is clamped at 15V. The SG6848x1’s controllers can

be used to improve the performance and reduce the

production cost of power supplies. The SG6848x1 is the

best choice for replacing linear and RCC power supplies.

It is available in DIP-8 and SOT-26 packages.

TYPICAL APPLICATION

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

MARKING DIAGRAMS PIN CONFIGURATION

ORDERING INFORMATION

Part Number Package

SG6848T1 SOT-26

SG6848D1 DIP-8

SG6848TZ1 SOT-26 (Lead Free)

SG6848DZ1 DIP-8 (Lead Free)

PIN DESCRIPTIONS

Pin No.

Name DIP-8 / (SOT-26) Type Function

GATE 1 / (6) Driver Output The totem-pole output driver for driving the power MOSFET.

VDD 2 / (5) Supply Power supply.

NC 3 No connection.

SENSE 4 / (4) Analog Input

Current sense. This pin senses the voltage across a resistor for peak-current-mode

control. If the voltage reaches the internal threshold, PWM output is disabled. This

activates cycle-by-cycle current limiting.

RI 5 / (3) Analog

Input/Output

A resistor connected from the RI pin to GND pin will generate a constant current source

for the controller. This current is used to determine PWM frequency. Increasing the

resistance will reduce PWM frequency. A 95kΩ resistor results in a 70kHz PWM

frequency.

NC 6 No connection.

FB 7 / (2) Analog Input Feedback. The FB pin accepts the output voltage regulation signal. It provides feedback

to the internal PWM comparator to adjust the duty cycle.

GND 8 / (1) Supply Ground.

1

2

34

5

6

SOT-26

GND

FB

RI

GATE

VDD

SENSE

DIP-8

RI

N

C

FB

GND

SENSE

N

C

VDD

GATE

4

3

2

1

5

6

7

8

XXX:AAH =SG6848T1

XXX:AAH =SG6848TZ1

M: Mask Version

W: Week code A~Z=W1~W26

A~Z=W27~W52

:Lead free package

D: D = DIP

P : Z = Lead Free

Null = Regular Package

M: Mask Version

XXXXXX: Wafer Lot

YY: Year; WW: Week

V: Assembl

y

Location

8

1

SG6848DP1

MXXXXXXYYWWV

1

XXXMW

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

BLOCK DIAGRAM

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

VDD DC Supply Voltage 25 V

VFB Input Voltage to FB Pin -0.3 to 6 V V

VSENSE Input Voltage to Sense Pin -0.3 to 6V V

PD Power Dissipation 300 mW

SOT-26 208.4 °C/W

RθJA Thermal Resistance (Junction to Air) DIP-8 82.5 °C/W

TJ Operating Junction Temperature -40 to +125 °C

TSTG Storage Temperature Range -55 to +150 °C

Pb free 260(+5/-0)

TR Peak Reflow Temperature Pb 230(+5/-0)

°C

* All voltage values, except differential voltages, are given with respect to GND pin.

* Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device.

RECOMMENDED OPERATING JUNCTION TEMPERATURE: -30°C ~ 105°C*

*For proper operation

ELECTRICAL CHARACTERISTICS (VDD=15V, TA = 25°C, unless noted)

VDD Section

Symbol Parameter Test Condition Min. Typ. Max. Unit

VOP Continuously Operating Voltage 20 V

VTH(ON) Start-up Threshold Voltage 15.3 16.3 17.3 V

VDD(MIN) Min. Operating Voltage 10.9 11.7 12.5 V

IDD ST Start-up Current 5 30 uA

IDD OP Operating Supply Current GATE = 1nF 3 5 mA

VDD-OVP Over Voltage Protection 22 23.5 25 V

Feedback Input Section

Symbol Parameter Test Condition Min. Typ. Max. Unit

ZFB Input Impedance 2 kΩ

IOZ Zero-duty-cycle Input Current 1.3 2.0 mA

VOP Open Loop Voltage 4.5 V

Oscillator Section

Symbol Parameter Test Condition Min. Typ. Max. Unit

FOSC PWM Frequency RI = 95kΩ 65 70 75 kHz

FOSC-GREEN Green-mode Min. Frequency RI = 95kΩ 15 kHz

FDY Frequency Variation versus VDD Deviation VDD = 14 to 20V 2 %

FDT Frequency Variation versus Temp. Deviation TA = -30 to 105 ℃ 2 %

IN Green-mode Start Threshold FB Input Current 1 mA

IG Green-mode Min. Freq. FB Input Current 1.16 mA

SG Green-mode Modulation Slope RI = 95kΩ 300 Hz/uA

RI RI pin resistance 66.5 150 kΩ

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

Current Sense Section

Symbol Parameter Test Condition Min. Typ. Max. Unit

ZCS Input Impedance 10 kΩ

TPD Delay to Output 100 nsec

VTH,FLT Current Limit Flatten Threshold Voltage 0.96 V

VTH,VALLEY Current Limit Valley Threshold Voltage 0.81 V

DCSAW Duty Cycle of SAW Limit 45 %

Gate Section

Symbol Parameter Test Condition Min. Typ. Max. Unit

DC (MAX) Maximum Duty Cycle 70 75 80 %

DC (MIN) Minimum Duty Cycle 0 %

BNK Leading-edge Blanking Time 200 nsec

VOL Output Voltage Low Sink current = 20mA 1.5 V

VOH Output Voltage High Source current = 20mA 8 V

TR Rising Time GATE = 1nF 250 nsec

TF Falling Time GATE = 1nF 80 nsec

VCLAMP Output Clamp Voltage VDD = 20V 15 17 V

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

TYPICAL CHARACTERISTICS

Start-up Threshold Voltage vs Temperature

16

16.2

16.4

16.6

16.8

17

-40 -25 -10 5 20 35 50 65 80 95 110 125

Temperature (℃)

VTH(ON) (V)

Start-up Current vs Temperature

0.000

2.000

4.000

6.000

8.000

10.000

-40 -25 -10 5 20 35 50 65 80 95 110 125

Temperature (℃)

IDD ST (uA)

Green-mode min. Frequency vs Temperature

14.0

14.2

14.4

14.6

14.8

15.0

-40 -25 -10 5 20 35 50 65 80 95 110 125

Temperature (℃)

FOSC-GREEN (kHz)

Min. Operating Voltage vs Temperature

10

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.8

10.9

11

-40 -25 -10 5 20 35 50 65 80 95 110 125

Temperature (℃)

VDD(MIN) (V)

PWM Frequency vs Temperature

64.600

64.700

64.800

64.900

65.000

65.100

65.200

65.300

-40 -25 -10 5 20 35 50 65 80 95 110 125

Temperature (℃)

FOSC (kHz)

PWM Frequency vs. FB

0

10

20

30

40

50

60

70

80

0.6 0.7 0.8 0.9 1 1.1 1.2

FB(mA)

FOSC (kHz)

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

OPERATION DESCRIPTION

The SG6848x1 devices integrate many useful

functions into one controller for low-power switching

mode power supplies. The following descriptions

highlight some of the features of the SG6848D1.

Start-up Circuitry

When the power is turned on, the input rectified

voltage, Vdc, charges the hold-up capacitor C1 via a

start-up resistor RIN. As the voltage of VDD pin reaches

the start threshold voltage VTH(ON), the SG6848x1

activates the entire power supply.

VDD

GND

SG6848D1

Vdc

IDDST

C1

RIN

TD_ON

VTH(ON)

D1

Figure 1. Power Circuit

The maximum power-on delay time is determined as

follows,













−⋅−= ⋅

−

1

)(

_

1)( CR

T

INDDSTdcONTH

IN

OND

eRIVV (1)

where

IDDST is the start-up current of SG6848x1;

TD_ON is the power-on delay time of the power

supply.

Due to the low start-up current, a large RIN such as

1.5Mohm can be used. Also with a hold-up capacitor of

10uF/50V, the power-on delay TD_ON is less than 2.8S for

90VAC input.

The FB input

This pin is designed for feedback control and to

activate the green-mode function. Figure 2 is a typical

feedback circuit mainly consisting of a shunt regulator

and an opto-coupler. R1 and R2 form a voltage divider for

the output voltage regulation. R3 and C1 are adjusted for

control-loop compensation. A small-value RC filter (e.g.

RFB= 47ohm, CFB= 1nF) placed from the FB pin to GND

can increase stability. The maximum source current on the

FB pin is 2mA. The phototransistor must be capable of

sinking this current to pull the FB level down at no load.

Thus, the value of the biasing resistor Rb is determined as

follows,

mAK

Rb

VVV ZDo 2≥⋅

−

(2)

where VD is the drop voltage of a photodiode, about 1.2V;

VZ is the minimum operating voltage of the shunt

regulator. Typical value is 2.5V;

K is the current transfer rate (CTR) of the opto-coupler.

For an output voltage Vo=5V, with CTR=100%, the

maximum value of Rb is 650ohm.

FB

VO

Rb

R1

C1

R2

R3

RFB

CFB

Figure 2. Feedback circuit.

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

Oscillator & Green Mode Operation

One external resistor, RIi, connected between RI and

GND pins is used to program the PWM frequency of the

SG6848x1. The approximated formula is:

)Kohm(R

)KHz(F

I

OSC

6650

= (3)

The recommended FOSC is from 50 to 100KHz.

RI

GND

SG6848D1

RI C I

Figure 3. Setting PWM frequency

The patented green-mode function provides off-time

modulation to reduce the PWM frequency at light-load

and no-load conditions. The sink current of the FB pin

determines the green mode operation as shown in Figure 4.

At light load, the sink current of the FB pin will increase.

When the sink current is larger than 1mA, the PWM

frequency decreases in order to reduce the power

consumption of the power supply at light-load and in

no-load conditions.

For lightning surge tests, a small capacitor (not over

50pF) connected from the RI pin to GND is recommended.

This added capacitor also improves stability, especially at

light load and high input line voltage conditions.

Figure 4. PWM frequency vs. FB current.

Built-in Slope Compensation

A flyback converter can be operated in either

discontinuous current mode (DCM) or continuous current

mode (CCM). There are many advantages to operating the

converter in CCM. With the same output power, a

converter in CCM exhibits smaller peak inductor currents

than one in DCM. Therefore, a small-sized transformer

and a low-rated MOSFET can be applied. On the

secondary side of the transformer, the rms output current

of DCM can be up to twice that of CCM. Larger wire

gauge and output capacitors with larger ripple current

ratings are required. DCM operation also results in higher

output voltage spikes. A large LC filter must also be

added. Therefore, a flyback converter in CCM achieves

better performance with lower component cost.

Despite the above advantages of operating in CCM,

there is one concern–stability. Operating in CCM, the

output power is proportional to the average inductor

current, while the peak current is controlled. This causes

the well-known sub-harmonic oscillation when the PWM

duty cycle exceeds 50%. Adding slope compensation

(reducing the current-loop gain) is an effective way to

prevent this oscillation. The SG6848x1 introduces a

synchronized positive-going ramp (VSLOPE) in every

switching cycle to stabilize the current loop. The sensed

voltage together with this slope compensation signal

(VSLOPE) is fed into the non-inverting input of the PWM

comparator. The resulting voltage is compared with the

FB signal to adjust the PWM duty cycle, such that the

output voltage is regulated. Therefore, users can use the

SG6848x1 to design a cost-effective, highly efficient and

compact sized flyback power supply operating in CCM

without adding any external components.

The positive ramp added is,

DVV SLSLOPE

⋅

=

(4)

where

VSL = 0.33V;

D = Duty cycle

OSC

F

5

OSC

F

B

)(kHzf

IN IG

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

Constant Output Power Limit

The maximum output power of a flyback converter

can generally be determined from the current-sense

resistor RS. When the load increases, the peak inductor

current increases accordingly. When the output current

arrives at the protection value, the OCP comparator

dominates the current control loop. OCP occurs when the

current-sense voltage reaches the threshold value. The

output GATE driver is turned off after a small propagation

delay, td. The delay time results in unequal power-limit

level under universal input. In the SG6848x1, a saw-tooth

power-limiter is designed to solve the unequal

power-limit problem. As shown in Figure 5, the power

limiter is designed as a positive ramp signal and is fed to

the inverting input of the OCP comparator. This results in

a lower current limit at high-line inputs than at low-line

inputs. However, with fixed propagation delay, td, the

peak primary current would be the same for various line

input voltages. Therefore the maximum output power can

practically be limited to a constant value within a wide

input voltage range without adding any external circuitry.

T2

T1

High line

sense voltage Low line

sense voltage

ton VTH,FLT

VTH,VALLEY

toff

0

Figure 5. Constant power limit compensation

Short Circuit Protection

When the output of a flyback power supply is shorted,

the primary VDD will decrease due to the coupling

polarity between the aux winding and the secondary

winding of a transformer. When VDD drops below the

UVLO level of the SG6848x1, the power supply will

enter hiccup operation mode and hence limit the output

power. However, it is possible that the VDD voltage

remains higher than the UVLO level even if the output is

shorted. This happens when the coupling between the aux

and the primary winding is too good. Therefore, the

construction of the transformer becomes a dominant

factor. The recommended construction layout is to

increase the insulation thickness for the aux winding and

place the primary aux winding in one side of the bobbin.

For low output voltage applications, using a low dropout

voltage diode and a larger secondary winding also helps.

Primary main winding

Secondary winding

Primary aux winding

Increased thickness

One side

Figure 6. Transformer construction

Leading-Edge Blanking

A voltage signal proportional to the MOSFET

current develops on the current-sensing resistor, RS. Each

time the MOSFET is turned on, a spike, which is induced

by the diode reverse recovery and by the output

capacitances of the MOSFET and diode, inevitably

appears on the sensed signal. Inside the SG6848x1, a

leading-edge blanking time of about 200 nsec. is

introduced to avoid premature termination of the

MOSFET by the spike. Therefore, only a small-value RC

filter (e.g. 100ohm + 470pF) is required between the

SENSE pin and RS. Still, a non-inductive resistor for the

RS is recommended.

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

Gate

Sense

SG6848D1

Blanking

Circuit

Figure 7. Turn on spike

Gate Drive

The SG6848x1’s output stage is a fast totem pole

driver that can drive a MOSFET gate directly. It is also

equipped with a voltage clamping Zener diode to protect

the MOSFET from damage caused by undesirable

over-drive voltage. The output voltage is clamped at 15V.

An internal pull-down resistor is used to avoid a floating

state of the gate before startup. A gate drive resistor in the

range of 47 to 100ohm is recommended. This resistor

limits the peak gate drive current and provides damping to

prevent oscillations at the MOSFET gate terminal.

ON/OFF

Driver

VDD

15V

SG6848D1

Gate

Figure 8. Gate drive

Lab Note

Before reworking or soldering/de-soldering on the

power supply, it is suggested to discharge the primary

capacitors by an external bleeding resistor. Otherwise the

PWM IC may be destroyed by external high voltage

during soldering or de-soldering.

This device is sensitive to ESD discharge. To

improve the production yield, the production line should

be ESD protected in accordance to ANSI ESD S1.1, ESD

S1.4, ESD S7.1, ESD STM 12.1, and EOS/ESD S6.1.

Printed Circuit Board (PCB) Layout

High frequency switching current/voltage makes

PCB layout a very important design issue. Good PCB

layout minimizes excessive EMI and helps the power

supply survive during surge/ESD tests. Here, we give

some common guidelines:

In order to get better EMI performance and reduce

line frequency ripples, the output of the bridge rectifier

should be connected to capacitor C1 first, and then to the

switching circuits.

The high frequency current loop is in C1 –

Transformer – MOSFET – RS – C1. The area enclosed

by this current loop should be as small as possible. Keep

the traces (especially 4→1) short, direct, and wide. High

voltage traces related to the drain of the MOSFET and the

RCD snubber should be kept far way from control circuits

to prevent unnecessary interference. If a heatsink is used

for the MOSFET, it’s better to connect this heatsink to a

ground.

As indicated by 3, the ground of control circuits

should be connected first before any other circuitry.

As indicated by 2, the area enclosed by the

transformer aux winding, D1, and C2 should also be

kept small. Place C2 close to the SG6848x1 for good

decoupling.

Two suggestions for ground connections, with

different pro and cons, are offered.

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

GND3→2→4→1: This should avoid common

impedance interference for the sense signal.

GND3→2→1→4: This should be better for ESD

tests, where the earth ground is not available on the power

supply. Regarding the ESD discharge path, the charges go

from secondary through the transformer’s stray

capacitance to GND2 first. Then the charge goes from

GND2 to GND1 and back to the mains. It should be noted

that control circuits should not be placed in the discharge

path. Point discharges for common choke can decrease the

high frequency impedance and help increase ESD

immunity.

Should a Y-cap between primary and secondary be

required, it is suggested to connect this Y-cap to the

positive terminal of C1 (Vdc). If this Y-cap is connected

to the primary GND, it should be connected to the

negative terminal of C1 (GND1) directly. The Point

discharge of this Y-cap also helps with ESD. However,

the distance between these two points should be at least

5mm according to safety requirements.

Sense

Gate

Vdc

VDD

RI

FB

GND

SG6848D1

C1

C2

RIN

CI

RI

CFB

RFB

Rg

Rf

RS

Cf

D1

3

2

1

4

Y-cap

5

Common mode

choke

Figure 9. Layout considerations

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

REFERENCE CIRCUIT

Circuit 5V/1A

VO

GND

R13

C10

R12

+

C9

U3

3

1

2

R1

D5

2 1

D1

2 1

R8

Q1

1

23

C3

U1

1

2

3 4

5

6

GND

FB

RI SENSE

VDD

GATE

+

C2

F1 L1

1 2

D4

2 1

R11

C1

R4

U2

1

2

4

3

CX1

R7

-+

BD1

1

4

3

2

R5 T1

8

5

7 3,4

1,210

9

L2

1 2

C6

R9

+

C4

R10

R6

R3

D2

21

+

C8

CY1

C7

R14

R2

L

N

BOM

Reference Component Reference Component

BD1 BD 1A/500V L2 10uH 6mm

CX1 (Optional) XC 0.1uF Q1 MOSFET 1A/600V

CY1 (Optional) YC 102P/400V (Y1) R1, R2 R 750KΩ 1206

C2 EC 10uF/400V 105℃ R4, R3 R 47KΩ 1206

C1 CC 103P/500V R5 R 47Ω 1206

C3 CC 102P/500V R6 R 4.7Ω 1206

C4 EC 10u/50V R7 R 100Ω 0805

C6 CC 472P 0805 R8 R 10Ω 1206

C7 (Optional) CC 102P/100V 1206 R10 (Optional) R 10Ω 1206

C8 EC 470u/10V 105℃ R9 R 100KΩ 0805

C9 EC 220u/10V 105℃ R11 R 100Ω 1/8W

C10 CC 222P 0805 R12 R 33KΩ 0805

D1 Diode FRI07 R13 R 33KΩ 1/8W

D2 Diode FR102 R14 R 4.7KΩ 0805

D4 Diode SB360 T1 EE-16

D5 (Optional) ZD 6.8V 0.5W U1 IC SG6848D1

F1 R 1Ω/0.5W U2 PC817

L1 20mH 6*8mm U3 TL431

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

PACKAGE INFORMATION

8 PINS - DIP (D)

41

85

D

E1

EeB

A1

A2

A

b

b1

L

e

°

Θ

Dimensions

Millimeters Inches

Symbol Min. Typ. Max. Min. Typ. Max.

A 5.334 0.210

A1 0.381 0.015

A2 3.175 3.302 3.429 0.125 0.130 0.135

b 1.524 0.060

b1 0.457 0.018

D 9.017 9.271 10.160 0.355 0.365 0.400

E 7.620 0.300

E1 6.223 6.350 6.477 0.245 0.250 0.255

e 2.540 0.100

L 2.921 3.302 3.810 0.115 0.130 0.150

eB 8.509 9.017 9.525 0.335 0.355 0.375

θ˚ 0˚ 7˚ 15˚ 0˚ 7˚ 15˚

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

6PINS - SOT (T)

13

64

E

e1

E1

e

D

b

A2

A1

A

θ

R1

R

L2

L1

L

θ

Detail A

c

1

Dimensions

Millimeters Inches

Symbol Min. Typ. Max. Min. Typ. Max.

A 1.45 0.057

A1 0.15 0.006

A2 0.90 1.15 1.30 0.036 0.045 0.051

b 0.30 0.50 0.011 0.020

c 0.08 0.22 0.003 0.009

D 2.90 0.114

E 2.80 0.110

E1 1.60 0.063

e 0.95 0.037

e1 1.90 0.075

L 0.30 0.45 0.60 0.020 0.018 0.024

L1 0.60 0.024

L2 0.25 0.010

R 0.10 0.004

R1 0.10 0.25 0.004 0.010

θ° 0° 4° 8° 0° 4° 8°

θ1° 5° 10° 15° 5° 10° 15°

Product Specification

Low-cost Green-Mode PWM Controller for Flyback Converters SG6848x1

Version 1.3(IAO33.0002.B4) Jan. 27, 2006

DISCLAIMERS

LIFE SUPPORT

System General’s products are not designed to be used as components in devices intended to support or sustain

human life. Use of System General’s products in components intended for surgical implant into the body, or other

applications in which failure of System General’s products could create a situation where personal death or injury may

occur, is not authorized without the express written approval of System General’s Chief Executive Officer. System

General will not be held liable for any damages or claims resulting from the use of its products in medical applications.

MILITARY

System General's products are not designed for use in military applications. Use of System General’s products in

military applications is not authorized without the express written approval of System General’s Chief Executive Officer.

System General will not be held liable for any damages or claims resulting from the use of its products in military

applications.

RIGHT TO MAKE CHANGES

System General reserves the right to change this document and/or this product without notice. Customers are advised

to consult their System General sales representative before ordering.

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SG6848x1 Datasheet. Www.s Manuals.com. R1.3 System General

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