TS19370CX6 RF Taiwan Semiconductor, TS19370CX6 RF Datasheet

LED DRIVER, WHITE, BOOST, 6SOT26

TS19370CX6 RF

Manufacturer Part Number
TS19370CX6 RF
Description
LED DRIVER, WHITE, BOOST, 6SOT26
Manufacturer
Taiwan Semiconductor
Datasheet

Specifications of TS19370CX6 RF

Led Driver Application
Backlighting, Display Module
No. Of Outputs
1
Output Current
320mA
Output Voltage
36V
Input Voltage
2.5V To 18V
Dimming Control Type
PWM
Operating
RoHS Compliant
Topology
Boost
Operating Temperature Range
-40°C To +85°C
Switching Frequency
1.2MHz
Efficiency
88%
Rohs Compliant
Yes
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.
Features
Application
Typical Application Circuit
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
Cellular Phones
Portable Electronics Devices PDA, GPS
LCD Display Module
White LED Backlighting
SOT-26
Pin Definition:
1. SW
2. Ground
3. Feedback
6. Input
5. OVP
4. CTRL
Boost (Step-up) WLED Driver with OVP
1/8
Ordering Information
Input Voltage vs. Efficiency
TS19370CX6 RF
Part No.
Package
SOT-26
3Kpcs / 7” Reel
TS19370
Packing
Version: D08

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TS19370CX6 RF Summary of contents

Page 1

... Cellular Phones ● Portable Electronics Devices PDA, GPS ● LCD Display Module ● White LED Backlighting Typical Application Circuit Boost (Step-up) WLED Driver with OVP Ordering Information Part No. Package TS19370CX6 RF SOT-26 Input Voltage vs. Efficiency 1/8 TS19370 Packing 3Kpcs / 7” Reel Version: D08 ...

Page 2

Absolute Maximum Rating Parameter Input Voltage Supply Voltage (Recommended) FB Voltage SW Voltage CTRL Voltage Ambient Temperature Range Junction Temperature Range Electrical Specifications ( Function Parameter Input Voltage Range Feedback Voltage FB Pin Bias Current Supply Current Switching ...

Page 3

Functional Block Pin Description Pin Function Ground 3 Feedback 4 CTRL 5 OVP 6 Input Boost (Step-up) WLED Driver with OVP Description Switching Pin. This is the collector of the internal NPN power switch. Connect to ...

Page 4

Application Information Operation The TS19370 uses a constant frequency, current mode control scheme to provide excellent line and load regulation. Operation can be best understood by referring to the block diagram. At the start of each oscillator cycle, the RS ...

Page 5

Application Information (Continue) LED Current Control The LED current is controlled by the feedback resistor (R1). The feedback reference is 95mV. The LED current is 95mV/R1. In order to have accurate LED current, precision resistors are preferred (1% is recommended). ...

Page 6

Application Information (Continue) 2. Using a Filtered PWM Signal The filtered PWM signal can be considered as an adjustable DC voltage. It can be used to replace the variable DC voltage source in dimming control. The circuit is shown as ...

Page 7

Marking Diagram Boost (Step-up) WLED Driver with OVP SOT-26 Mechanical Drawing DIM Device Code Y = Year Code M = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, ...

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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 ...

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