The AS3833 is a 6 channel high precision LED controller with PWM input for driving external bipolar transistors in LED backlight panels, also optimized for 2D and 3D operation in TV applications. The integrated step-up controller provides the necessary output voltage for the LED string supply. The SMPS feedback control optimizes the power efficiency by adjusting the LED string supply voltage.
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Outputs [#] | 6 |
LED current per output [mA] | 300 |
Features | integrated step-up, 1 PWM input with phase shift, use of inexpensive BJTs with BETA compensation, LED string voltage only limited by BJT rating |
Error detection | LED short/open with BJT temp. supervision |
Read-back | |
LED-to-LED matching [%] | 0.6 |
Supply voltage [V] | 12 - 50 |
Package | TQFP32 (7x7)-0.8p SOIC28-1.27p |