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TS19370 数据表(PDF) 1 Page - Taiwan Semiconductor Company, Ltd

部件名 TS19370
功能描述  Boost (Step-up) WLED Driver with OVP
Download  8 Pages
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制造商  TSC [Taiwan Semiconductor Company, Ltd]
网页  http://www.taiwansemi.com
标志 TSC - Taiwan Semiconductor Company, Ltd

TS19370 数据表(HTML) 1 Page - Taiwan Semiconductor Company, Ltd

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TS19370
Boost (Step-up) WLED Driver with OVP
1/8
Version: D08
SOT-26
General Description
The TS19370 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The
device can drive 2 ~ 9 LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED
currents resulting in uniform brightness and eliminating the need for ballast resistors. The output capacitor can be as
small as 0.22µF, saving space versus alternative solutions. A low 95mV feedback voltage minimizes power loss for
better efficiency. Additional feature include over output voltage limiting when LEDs are disconnected.
The TS19370 switches at a fixed frequency of 1.2MHz, allowing the use of tiny, low profile inductors and capacitors to
minimize footprint and cost in space consideration applications for cellular phone backlighting or other hand held
equipment.
Ordering Information
Part No.
Package
Packing
TS19370CX6 RF
SOT-26
3Kpcs / 7” Reel
Features
Inherently Matched LED Current
High Efficiency: 88% Typical
Drives Up to 6 LEDs @ Vin 5V
Drives Up to 9 LEDs @ Vin 9~15V
Over Output Voltage Protection 30V
Fast 1.2MHz Switching Frequency
Requires Only 0.22µF Output Capacitor
PWM dimming control 1KHz to 10KHz
Analog dimming control
Application
Cellular Phones
Portable Electronics Devices PDA, GPS
LCD Display Module
White LED Backlighting
Input Voltage vs. Efficiency
Typical Application Circuit
Pin Definition:
1. SW
6. Input
2. Ground
5. OVP
3. Feedback
4. CTRL


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