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TS19373 Dataheets PDF



Part Number TS19373
Manufacturers Taiwan Semiconductor Company
Logo Taiwan Semiconductor Company
Description 800mA Buck (Step-down) WLED Driver
Datasheet TS19373 DatasheetTS19373 Datasheet (PDF)

800mA Buck (Step-down) WLED Driver SOT-25 Pin Definition: 1. VIN 2. Ground 3. CT 4. ISENSE 5. SW www.DataSheet4U.com TS19373 General Description The TS19373 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 40V and provides an externally adjustable output current of up to 800mA. TS19373 includes the output switch.

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800mA Buck (Step-down) WLED Driver SOT-25 Pin Definition: 1. VIN 2. Ground 3. CT 4. ISENSE 5. SW www.DataSheet4U.com TS19373 General Description The TS19373 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 40V and provides an externally adjustable output current of up to 800mA. TS19373 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Features ● ● ● ● ● ● ● Wide Input Voltage Range 6V~40V 800mA Output Current High Efficiency up to 90% Drives up to 3 (1~3W) LEDs @ VIN 12V Drives up to 7 (1~3W) LEDs @ VIN 24V 180kHz Switching Frequency Internal PWM Filter Application ● ● ● ● ● DC/DC or AC/DC LED driver applications Back lighting of flat panel displays Signage and decorative LED lightings Chargers LED Lighting Equipment – MR16, Tube Ordering Information Part No. TS19373CX5 RF Package SOT-25 Packing 3Kpcs / 7” Reel Block Diagram 1/7 Version: A09 800mA Buck (Step-down) WLED Driver Absolute Maximum Rating Parameter Input Voltage Supply Voltage (Recommended) FB Voltage SW Voltage Output SW Current Ambient Temperature Range Junction Temperature Range www.DataSheet4U.com TS19373 Symbol VIN VIN VFB VSW ISW TA TJ Limit 40 6 ~ 40 -0.3 ~ 40 36 800 -40 to +85 +150 Unit V V V V mA o o C C Electrical Specifications (Ta = 25oC, unless otherwise noted) Parameter Input Voltage Range Line Regulation Charge Current Discharge Current Switching Frequency Current Limit Sense Voltage Switch VCESAT Supply Current Collector off-state Current Symbol VIN REGLINE ICHARGE IDISCHARGE FOSC VSENSE VSAT ICC IC(OFF) Test Conditions Min 6 -- Typ -1.4 30 230 180 -1.0 3 1 Max 40 5 45 290 -350 1.3 4 100 Units V mV uA uA kHz mV V mA uA VIN =6V~40V VIN =6V~40V CT =100pF, IDISCHARGE = ICHARGE ISW = 300mA VIN =6V~40V, CT =1nF VCE =40V -180 -250 --- Note: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible 2/7 Version: A09 800mA Buck (Step-down) WLED Driver Application Information Pin Description Pin 1 2 3 4 5 www.DataSheet4U.com TS19373 Function VIN Ground Timing Capacitor ISENSE SW Description Input Voltage Supply pin Ground Pin Timing capacitor oscillator input Peak current sense input to monitor the voltage drop across an external resistor to limit the peak current through the circuit Switching Pin. This is the internal Darlington switch collector Inductor Selection A 100uH inductor is recommended for most TS19373 applications. Although small size and high efficiency are major concerns, the inductor should have low core losses at 180kHz and low DCR (copper wire resistance). Diode Selection Schottky diodes, with their low forward voltage drop and fast reverse recovery, are the ideal choices fo.


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