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AT9933DB1 PDF预览

AT9933DB1

更新时间: 2024-11-05 04:07:23
品牌 Logo 应用领域
超科 - SUPERTEX 驱动器
页数 文件大小 规格书
11页 1271K
描述
High Bright LED Driver IC Meeting Automotive Requirements

AT9933DB1 数据手册

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AT9933DB1  
High Bright LED Driver IC  
Meeting Automotive Requirements  
General Description  
Specifications  
Parameter  
The AT9933DB1 is an LED driver capable of driving up  
to 7 1-watt LEDs in series from an automotive input of  
9 - 16V DC. The demo board uses Supertex’s AT9933  
in a boost-buck topology. The converter operates at  
frequencies in excess of 300kHz and has excellent output  
current regulation over the input voltage range. It can also  
withstand transients up to 42V and operate down to 6V  
input. The converter is also protected against open LED  
and output short circuit conditions. Protection against  
reverse polarity up to 20V is also included.  
Value  
9.0VDC - 16VDC  
42VDC  
Input voltage (steady state):  
Input voltage (transient):  
Output LED string voltage:  
Output current:  
28V max  
350mA +/-5%  
5% typical  
Output current ripple:  
300kHz (9.0V input)  
430kHz (13.5V input)  
500kHz (16.0V input)  
Switching frequency:  
Board Layout  
Efficiency:  
80% (at 13.5V input)  
Included; clamps  
output voltage at 33V  
Open LED protection:  
Included; limits current  
at 350mA  
Output short circuit protection:  
Reverse polarity protection:  
Input current limit:  
-20V max  
1.9A  
PWM dimming frequency:  
Up to 1.0kHz  
Meets SAE J1113  
conducted EMI  
standards  
Conducted EMI:  
Actual Size: 2.25” x 1.25”  
Connections:  
Input:  
Enable/PWM Dimming:  
The input is connected between the terminals of connector To just enable the board, short pins 1 and 2 of connector J3  
J1 as shown in the Connection Diagram.  
as shown. For PWM dimming, connect the external push-pull  
square wave source between terminals 1 and 3 of connector  
J3 as shown by the dotted lines.  
Output:  
The output is connected between the terminals of connector  
J2 as shown.  
Note: During PWM dimming, pin 2 of connector J3 should  
be left open. Also, the PWM signal must have the proper  
polarity with the positive connected to pin 1 of J3. Note that  
pin 3 of J3 is internally connected to the return path of the  
input voltage  

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