TS19376CY5 RMG Taiwan Semiconductor

TS19376 1A Step-down High Brightness LED Driver SOT-89-5L Pin De finition: 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 Application Wide input voltage range: 8V to 32V White LED Backlighting Up to 1A output current High Power LED Application 5000:1 Dimming LED Lighting Equipment Single pin on/off and brightness control using PWM Ordering Information Up to 1MHz switching frequency Typical 5% output current accuracy Part No. Package Packing High-Side Current Sense TS19376CY5 RMG SOT-89-5L 1Kpcs / 7 Reel Hysteretic Control: No Compensation Note: G denotes Halogen Free Product. Adjustable Constant LED Current Absolute Maximum Rating Parameter Symbol Limit Unit Supply Voltage V -0.3 to 40 V IN Driver output Voltage SW -0.3 to 40 V Current sense input (Respect to V ) CSN +0.3 to (-6.0) V IN Logic level dimming input DIM -0.3 to +6 V Switch output current I 1.0 A SW Power Dissipation P 1.5 W DMAX Operation Junction Temperature Range T -40 to 125 C J Storage Temperature T -55 to 150 C STG Thermal Resistance from Junction to case 15 C/W JC Thermal Resistance from Junction to ambient 50 C/W JA 2 Note: is measured with the PCB copper area (need connect to Exposed Pad) of approximately 1 in (Multi-layer). JA 1/8 Version: A12 TS19376 1A Step-down High Brightness LED Driver o Electrical Specifications (V =12V, T =25 C, unless otherwise noted) IN A Characteristics Symbol Conditions Min Typ Max Units Input voltage V 8 -- 32 V IN Under voltage lock out V V rising -- 7 -- V UVLO IN UVLO Hysterisis V V falling -- 1000 -- mV UVLO hys IN Max. Switching Frequency F -- -- 1 MH SW Z Current Sense Mean current sense threshold voltage V V V 120 130 140 mV CSN IN CSN Sense threshold hysteresis V -- 15 -- % CSN hys CSN Pin Input Current I V V = 50mV -- 0.5 -- A CSN IN CSN DIM Input DIM input voltage High V 2.0 -- -- V DIM H DIM input voltage Low V -- -- 0.3 V DIM L Max. DIM Frequency f f = 500kHz -- -- 50 kH DIM OSC Z Duty cycle range of low frequency dimming f = 100Hz 0.02% -- 1 DIM D PWM LF Brightness control range -- 5000:1 -- Duty cycle range of high frequency dimming f = 20kHz 4% -- 1 DIM D PWM HF Brightness control range -- 25:1 -- DIM pull up resistor to Internal R -- 300 -- K DIM supply voltage DIM input leakage low I V = 0 -- 70 -- A DIM L DIM Output Switch Saturation Voltage V I = 0.3A -- 0.8 1.0 V SAT OUT Saturation Voltage V I = 0.8A -- 1.0 1.2 V SAT OUT Continuous SW Current I -- -- 1.0 A SWmean SW Leakage Current I -- 0.5 5 A LEAK Thermal Shutdown Thermal Shutdown Threshold T -- 150 -- C SD Thermal Shutdown hysteresis T -- 35 -- C SD-hys 2/8 Version: A12