TS19372_10 TSC | Alldatasheet

Document overview

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Technical content

Features

  • Wide Input Voltage Range 6V~40V
  • Output Current Optional by MOSFET
  • High Efficiency up to 92%
  • Drives up to 3 (1~3W) LEDs @ V IN 12V
  • Drives up to 7 (1~3W) LEDs @ V IN 24V
  • 180kHz Switching Frequency
  • Internal PWM Filter Application
  • LED Flashlights
  • White LED Backlighting
  • White LED Driving
  • Multiple LED Driving
  • LED Lighting Equipment

Ordering Information

Part No. Package Packing TS19372CX5 RF SOT-25 3Kpcs / 7” Reel Block Diagram Pin Definition : 1. SW 2. Ground 3. C T 4. I SENSE 5. V IN

Buck (Step-down) WLED Driver with External Switch 2/9 Version: D09 Absolute Maximum Rating Parameter Symbol Limit Unit Input Voltage VIN 40 V Supply Voltage (Recommended) V IN 6 ~ 40 V FB Voltage VFB -0.3 ~ 40 V SW Voltage VSW 36 V Power Dissipation PD 450 mW Ambient Temperature Range T A -40 to +85 oC Junction Temperature Range T J +150 oC Electrical Specifications (Ta = 25 oC, unless otherwise noted) Parameter Symbol Test Conditions Min Typ Max Units Input Voltage Range V IN 6 -- 40 V Line Regulation REG LINE -- 1.4 5 mV Charge Current I CHARGE V IN =6V~40V -- 30 45 uA Discharge Current I DISCHARGE V IN =6V~40V 180 230 290 uA Switching Frequency F OSC C T = 100pF, -- 180 -- kHz Current Limit Sense Voltage V SENSE I DISCHARGE = I CHARGE 250 -- 350 mV Switch V CESAT V SAT I SW =300mA -- 1.0 1.3 V Supply Current I CC V IN =6V~40V, C T =1nF -- 3 4 mA Collector off-state Current I C(OFF) V CE =40V 1 100 uA Note: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible Pin Description Pin Function Description

1 SW Driver Switching Pin

2 Ground Ground Pin.

3 Timing Capacitor Timing capacitor oscillator input

4 I SENSE Peak current sense input to monitor the voltage drop across an external

resistor to limit the peak current through the circuit

5 VIN Input Voltage Supply pin

Buck (Step-down) WLED Driver with External Switch 3/9 Version: D09

Application Information

A 100uH inductor is recommended for most TS19372 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 for TS19372 applications. The forward voltage drop of a Schottky diode represents the conduction losses in the diode while the diode capacitance represents the switching losses. For diode selection, both forward voltage drop and diode capacitance need to be considered. Schottky diodes with higher current ratings usually have lower forward voltage drop and larger diode capacitance, which can cause significant switching losses at the 180kHz switching frequency of the TS19372. Capacitor Selection For Input capacitor and timing capacitor are able to use small ceramic capacitor for most of TS19372 applications. When AC input, to add a 100µF electric capacitor for input capacitor is recommended.

Buck (Step-down) WLED Driver with External Switch 4/9 Version: D09 Typical Application Circuit (DC Input) Reference Design Information: TS19372CX5 + TSM2318CX VIN Range (V) L (uH) LED (Series) LED (W) Current (mA) (ohm) (ohm) Efficiency (%) 12 68 3pcs 1 350 0.54 1k 88 24 100 6pcs 1 350 0.54 1k 92 TS19372CX5 + TSM4436CS VIN Range (V) L (uH) 1W LED (Series) LED (W) Current (mA) (ohm) (ohm) Efficiency (%) 12 68 3pcs 3 700 0.32 1k 88 12 68 2pcs 5 1000 0.22 1k 88 12 68 2pcs 5 1400 0.1 1k 86 24 100 6pcs 3 700 0.16 1k 92 24 100 6pcs 5 1000 0.11 1k 92 24 100 6pcs 5 1400 0.03 1k 90 Bill of Materials: Designation Description Package Manufacture Remark LED Driver TS19372CX5 SOT-25 TSC -- D1 SK34A SMA TSC 3A, 40V M1 TSM2318CX SOT-23 TSC N-CH 40V / 3.9A TSM4436CS SOP-8 TSC N-CH 60V / 8A Cin 10uF 805 Generic Ceramic C1 820pF 805 Generic Ceramic Input Voltage vs. Efficiency

Buck (Step-down) WLED Driver with External Switch 5/9 Version: D09 Typical Application Circuit (AC Input) Reference Design Information: TS19372CX5 + TSM2318CX VIN Range (V) L (uH) LED (Series) LED (W) Current (mA) (ohm) (ohm) Efficiency (%) 12 68 3pcs 1 350 0.54 1k 88 24 100 6pcs 1 350 0.54 1k 92 TS19372CX5 + TSM4436CS VIN Range (V) L (uH) 1W LED (Series) LED (W) Current (mA) (ohm) (ohm) Efficiency (%) 12 68 3pcs 3 700 0.32 1k 88 12 68 2pcs 5 1000 0.22 1k 88 12 68 2pcs 5 1400 0.1 1k 86 24 100 6pcs 3 700 0.16 1k 92 24 100 6pcs 5 1000 0.11 1k 92 24 100 6pcs 5 1400 0.03 1k 90 Bill of Materials: Designation Description Package Manufacture Remark LED Driver TS19372CX5 SOT-25 TSC -- D1 SK34A SMA TSC 3A, 40V D2.3.4 SS23M uSMA TSC 2A, 30V M1 TSM2318CX SOT-23 TSC N-CH 40V / 3.9A TSM4436CS SOP-8 TSC N-CH 60V / 8A Cin 10uF 805 Generic Ceramic C1 820pF 805 Generic Ceramic Input Voltage vs. Efficiency

Buck (Step-down) WLED Driver with External Switch 6/9 Version: D09 Typical Application Circuit – Buck Dimming Control Circuit 1W LED 3S1P Bill of Materials: Designation Description Package Manufacture Remark LED Driver TS19372CX5 SOT-25 TSC -- D1 SK34A SMA TSC 3A, 40V M1. M2 TSM2N7002KCX SOT-23 TSC M3 TSM2318CX SOT-23 TSC N-CH 40V / 3.9A L1 100uH -- Generic Isat >1.5A R1 0.1Ω 1206 Generic -- R2, R3 1k Ω 1206 Generic -- R4, R5, R6 10kΩ 1206 Generic C1 10uF 805 Generic Ceramic C2 820pF 805 Generic Ceramic

Buck (Step-down) WLED Driver with External Switch 7/9 Version: D09 Typical Application Circuit – Buck ON/OFF Control Circuit 1W LED 3S1P Bill of Materials: Designation Description Package Manufacture Remark LED Driver TS19372CX5 SOT-25 TSC -- D1 SK34A SMA TSC 3A, 40V M1 TSM2N7002KCX SOT-23 TSC M2 TSM2318CX SOT-23 TSC N-CH 40V / 3.9A L1 100uH -- Generic Isat >1.5A R1 0.1Ω 1206 Generic -- R2, R3 1k Ω 1206 Generic -- R4 10kΩ 1206 Generic C1 820pF 805 Generic Ceramic C2 100uF Generic Tantalum or Electrolysis * AC Input

Buck (Step-down) WLED Driver with External Switch 8/9 Version: D09 SOT-25 Mechanical Drawing Marking Diagram 72 = Devi e Code Y = Year Code M = Month Code (A =Jan, B =Feb, C =Mar, D =Apl, E=May, F=Jun, G =Jul, H =Aug, I=Sep, J=Oct, K =Nov, L=Dec) L = Lot Code SOT-25 DIMENSION DIM MILLIMETERS INCHES MIN MAX MIN MAX. A+A1 0.09 1.25 0.0354 0.0492 B 0.30 0.50 0.0118 0.0197 C 0.09 0.25 0.0035 0.0098 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 e 1.90 BSC 0.0748 BSC H 2.40 3.00 0.09449 0.1181 L 0.35 BSC 0.0138 BSC Ө1 0º 10º 0º 10º S1 0.95 BSC 0.0374 BSC

Buck (Step-down) WLED Driver with External Switch 9/9 Version: D09 Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale.