PT4115 Datasheet. Www.s Manuals.com. Pt4115e R2.9 Powtech

User Manual: Datasheets PT4115, PT4115B89E, PT4115B89E-B, PT4115BSOH, PT4115BSOH-B.

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30V, 1.2A Step-down High Brightness LED Driver with 5000:1 Dimming China Resources Powtech (Shanghai) Limited WWW.CRPOWTECH.COM Page 1 PT4115_DS Rev EN_2.9 PT4115 GENERAL DESCRIPTION The PT4115 is a continuous conduction mode inductive step-down converter, designed for driving single or multiple series connected LED efficiently from a voltage source higher than the total LED chain voltage. The device operates from an input supply between 6V and 30V and provides an externally adjustable output current of up to 1.2A. Depending upon the supply voltage and external components, the PT4115can provide more than 30 watts of output power. The PT4115 includes the power switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current, and a dedicated DIM input accepts either a DC voltage or a wide range of pulsed dimming. Applying a voltage of 0.3V or lower to the DIM pin turns the output off and switches the device into a low current standby state. The PT4115 is available in SOT89-5 and ESOP8 packages. FEATURES  Simple low parts count  Wide input voltage range: 6V to 30V  Up to 1.2A output current  Single pin on/off and brightness control using DC voltage or PWM  Up to 1MHz switching frequency  Typical 5% output current accuracy  Inherent open-circuit LED protection  High efficiency (up to 97%)  High-Side Current Sense  Hysteretic Control: No Compensation  Adjustable Constant LED Current  ESOP8 package for large output power application  RoHS compliant APPLICATIONS  Low voltage halogen replacement LEDs  Automotive lighting  Low voltage industrial lighting  LED back-up lighting  Illuminated signs  SELV lighting  LCD TV backlighting ORDERING INFORMATION PACKAGE TEMPERATURE RANGE ORDERING PART NUMBER TRANSPORT MEDIA MARKING SOT89-5 -40 oC to 85 oC PT4115B89E:A type PT4115B89E-B:B type Tape and Reel 1000 units PT4115 xxxxxX ESOP8 -40 oC to 85 oC PT4115BSOH:A type PT4115BSOH-B:B type Tape and Reel 2500 units PT4115 xxxxxX Note: TYPICAL APPLICATION CIRCUIT PT4115PT4115VIN CSN SWDIMGNDRSLCINVIND68uH100uFAC12-18VDC6-30V0.13Ω3WLED xxxxxXAssembly Factory CodeLot Number
30V, 1.2A Step-down High Brightness LED Driver with 5000:1 Dimming China Resources Powtech (Shanghai) Limited WWW.CRPOWTECH.COM Page 2 PT4115_DS Rev EN_2.9 PT4115 PIN ASSIGNMENT PIN DESCRIPTIONS PIN No. PIN NAMES DESCRIPTION 1 SW Switch Output. SW is the drain of the internal N-Ch MOSFET switch. 2 GND Signal and power ground. Connect directly to ground plane. 3 DIM Logic level dimming input. Drive DIM low to turn off the current regulator. Drive DIM high to enable the current regulator. 4 CSN Current sense input 5 VIN Input Supply Pin. Must be locally bypassed. - Exposed PAD Internally connected to GND. Mount on board for lower thermal resistance. ESOP8 4,5 NC No connection ABSOLUTE MAXIMUM RATINGS (note1) SYMBOL ITEMS VALUE UNIT VIN Supply Voltage -0.3~45 V SW Drain of the internal power switch -0.3~45 V CSN Current sense input (Respect to VIN) +0.3~(-6.0) V DIM Logic level dimming input -0.3~6 V ISW Switch output current 1.5 A PDMAX Power Dissipation (Note 2) 1.5 W PTR Thermal Resistance, SOT89-5 θJA 45 oC /W PTR Thermal Resistance, ESOP8 θJA 40 oC /W TJ Operation Junction Temperature Range -40 to 150 oC TSTG Storage Temperature -55 to 150 oC ESD Susceptibility (Note 3) 2 kV 12345678PT4115CSNVINSWNC NCGNDPGNDADIMESOP8

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