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ON Semiconductor - 350 mA High Efficiency Step Down LED Driver

Numéro de référence CAT4201
Description 350 mA High Efficiency Step Down LED Driver
Fabricant ON Semiconductor 
Logo ON Semiconductor 





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CAT4201 fiche technique
CAT4201
350 mA High Efficiency
Step Down LED Driver
Description
The CAT4201 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 350 mA from
supplies as high as 36 V.
The switching architecture of the CAT4201 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 1 MHz, 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 ideal for space constrained applications.
Features
LED Drive Current up to 350 mA
Compatible with 12 V and 24 V Standard Systems
Handles Transients up to 40 V
Single Pin Control and Dimming Function
Power Efficiency up to 94%
Drives LED Strings of up to 32 V
Open and Short LED Protection
Parallel Configuration for Higher Output Current
TSOT−23 5−lead Package
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
12 V and 24 V Lighting Systems
Automotive and Aircraft Lighting
General Lighting, High Brightness 350 mA LEDs
VBAT
9 V C1
4.7 mF
R1
10 kW
CAT4201
VBAT
RSET
CTRL
SW
GND
D C2
10 mF
L
22 mH
D: ON Semiconductor MBR0540
L: Sumida CDRH6D26−220
See Table 4 on page 6 for external component selection.
Figure 1. Typical Application Circuit
300 mA
www.onsemi.com
5
1
TSOT−23
TD SUFFIX
CASE 419AE
PIN CONNECTIONS AND
MARKING DIAGRAMS (Top Views)
1
CTRL
VBAT
GND
RSET
SW
TSOT−23
TF = Specific Device Code
Y = Production Year (Last Digit)
M = Production Month: (1−9, O, N, D)
ORDERING INFORMATION
Device
CAT4201TD−GT3
Package
TSOT−23
(Pb−Free)
Shipping
3,000/
Tape & Reel
* Plated Finish: NiPdAu
© Semiconductor Components Industries, LLC, 2015
September, 2015 − Rev. 9
1
Publication Order Number:
CAT4201/D

PagesPages 12
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