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TH1200F

Zetex Semiconductors
Part Number TH1200F
Manufacturer Zetex Semiconductors
Description 350mA High Efficiency Step Down LED Driver
Published Dec 12, 2015
Detailed Description TH1200F 350mA High Efficiency Step Down LED Driver FEATURES „ LED drive current up to 350mA „ Compatible with 12V and 2...
Datasheet PDF File TH1200F PDF File

TH1200F
TH1200F

Overview
TH1200F 350mA High Efficiency Step Down LED Driver FEATURES „ LED drive current up to 350mA „ Compatible with 12V and 24V standard systems „ Handles transients up to 40V „ Single Pin Control and Dimming function „ Power Efficiency up to 94% „ Drives LED strings of up to 32V „ Open and short LED protection „ Parallel configuration for higher output current „ RoHS-compliant TSOT-23 5-lead package APPLICATIONS „ 12V and 24V Lighting Systems „ Automotive and Aircraft Lighting „ General lighting „ High Brightness 350mA LEDs ORDERING INFORMATION Part Number TH1200F-YE-ML1 Quantity per Reel 3000 * Plated Finish: NiPdAu PIN CONFIGURATION Package Marking TFxx TSOT-23 5-lead CTRL 1 5 VBAT GND 2 RSET 3 4 SW (Top View) DESCRIPTION The TH1200F is a high efficiency step-down converter optimized to drive high current LEDs.
A patented switching control algorithm allows highly efficient and accurate LED current regulation.
A single RSET resistor sets the full scale LED string current up to 350mA from supplies as high as 36V.
The switching architecture of the TH1200F results in extremely low internal power dissipation allowing the device to be housed in a tiny package without the need for dedicated heat sinking.
The device is compatible with switching frequencies of up to 1MHz, making it ideal for applications requiring small footprint and low value external inductors.
Analog dimming and LED shutdown control is provided via a single input pin, CTRL.
Additional features include overload current protection and thermal shutdown.
The device is available in the low profile 5-lead thin SOT23 package and is ideal for space constrained applications.
For Ordering Information details, see page 14.
TYPICAL APPLICATION CIRCUIT Bulb Replacement VBAT 9V C1 4.
7µF R1 10kΩ VBAT TH1200F RSET CTRL SW GND D C2 10µF L 22µH 300mA D: Central Schottky CMDSH05-4 L: Sumida CDRH6D26-220 See Table 1 on page 6 for external component selection.
1 TH1200F Absolute Maximum Ratings(1) 0F...


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