Datasheet Taiwan Semiconductor TS19376CY5

TS19376
1A Step-down High Brightness LED Driver
SOT-89-5L
Pin Definition: 1. SW 2. GND 3. DIM 4. CSN 5. VIN General Description
The TS19376 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 8V and 32V and provides an externally adjustable output current of up to 1A. Depending upon the supply voltage and external components, the TS19376 can provide more than 15 watts of output power. The TS19376 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 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 Features Wide input voltage range: 8V to 32V Up to 1A output current 5000:1 Dimming Single pin on/off and brightness control using PWM Up to 1MHz switching frequency Typical 5% output current accuracy High-Side Current Sense Hysteretic Control: No Compensation Adjustable Constant LED Current Application White LED Backlighting High Power LED Application LED Lighting Equipment Ordering Information
Part No.
TS19376CY5 RMG Package
SOT-89-5L Packing
1Kpcs / 7" Reel Note: "G" denotes Halogen Free Product. Absolute Maximum Rating
Parameter
Supply Voltage Driver output Voltage Current sense input (Respect to VIN) Logic level dimming input Switch output current Power Dissipation Operation Junction Temperature Range Storage Temperature Thermal Resistance from Junction to case Thermal Resistance from Junction to ambient Symbol
VIN SW CSN DIM ISW PDMAX TJ TSTG JC JA Limit
-0.3 to 40 -0.3 to 40 +0.3 to (-6.0) -0.3 to +6 1.0 1.5 -40 to 125 -55 to 150 15 50
2 Unit
V V V V A W ° C ° C ° C/W ° C/W Note: JA is measured with the PCB copper area (need connect to Exposed Pad) of approximately 1 in (Multi-layer). 1/8 Version: A12 TS19376
1A Step-down High Brightness LED Driver
Electrical Specifications (VIN=12V, TA =25oC, unless otherwise noted)
Characteristics Input voltage Under voltage lock out UVLO Hysterisis Max. Switching Frequency Current Sense Mean current sense threshold voltage Sense threshold hysteresis CSN Pin Input Current DIM Input DIM input voltage High DIM input voltage Low Max. DIM Frequency Duty cycle range of low frequency dimming Brightness control range Duty cycle range of high frequency dimming Brightness control range DIM pull up r …