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TD8203 PDF даташит

Спецификация TD8203 изготовлена ​​​​«Techcode» и имеет функцию, называемую «White LED Step-up Converter».

Детали детали

Номер произв TD8203
Описание White LED Step-up Converter
Производители Techcode
логотип Techcode логотип 

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TD8203 Даташит, Описание, Даташиты
Techcode®
White LED Step-up Converter
DATASHEET
TD8203
General Description
Features
The TD8203 is a current-mode and fixed frequency boost
converter with an integrated N-FET to drive white LEDs.
The series connection allows the LED current to be
identical for uniform brightness. Its low on-resistance of
NFET and low feedback voltage reduce power loss and
achieve high efficiency. Fast switching frequency(1.5MHz
typical) allows using small-size inductor and both of input
and output capacitors. An over voltage protection
function,which monitors the output voltage via OVP pin,
stops switching of the IC if the OVP voltage exceeds the
over voltage threshold. An internal soft-start circuit
eliminates the inrush current during start-up.
The TD8203 also integrates under-voltage lockout,
overtemperature protection, and current limit circuits to
protect the IC in abnormal conditions. The TD8203 is
available in a SOT-23-6A
Wide Input Voltage from 2.7V to 6V
Fixed 1.5MHz Switching Frequency
Reference Voltage : 0.2V
PWM Brightness Control with Wide Frequency
Range of 100Hz to 100kHz
Build-In Power MOSFET : 0.2Ω
Open-LED Protection
Under-Voltage Lockout Protection
Over-Temperature Protection
<1mA Quiescent Current during Shutdown
SOT-23-6A
Halogen and Lead Free Available
RoHS Compliant
Applications
White LED Display Backlighting
Cell Phone and Smart Phone
PDA, PMP, MP3
Digital Camera
December, 20, 2011
Techcode Semiconductor Limited
1
www.techcodesemi.com









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TD8203 Даташит, Описание, Даташиты
Techcode®
White LED Step-up Converter
Pin Assignments
DATASHEET
TD8203
Pin Description
Pin Number Pin Name Description
1 LX Switch pin. Connect this pin to inductor/diode here.
2 GND Ground
Feedback Pin. Connect this pin to cathode of the lowest LED and current-sense resistor
3 FB
(R1). Calculate resistor value according to R1=VREF/ILED .
Enable Control Input. Forcing this pin above 1.0V enables the device, or forcing this pin
4 EN below 0.4V to shut it down. In shutdown, all functions are disabled to decrease the
supply current below 1A. Do not leave this pin floating.
5 OVP Converter Output and Over-Voltage Protection Input Pin.
6 IN Main Supply Pin. Must be closely decoupled to GND with a 4.7F or greater ceramic
capacitor.
December, 20, 2011
Techcode Semiconductor Limited
2
www.techcodesemi.com









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TD8203 Даташит, Описание, Даташиты
Techcode®
White LED Step-up Converter
Ordering Information
TD8203□ □ □
DATASHEET
TD8203
Circuit Type
Over-Voltage Threshold Code:
A-24V B-16V
Package
T:SOT23
Functional Block Diagram
Packing:
BlankTube
December, 20, 2011
Functional Block Diagram of TD8203
Techcode Semiconductor Limited
3
www.techcodesemi.com










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