Super family listed input voltage up to +40V LED driver, providing 3 channel driver IC

American Super branch (Supertex) listed the input voltage range of + 10 ~ 40V LED driver IC "HV9985". Integrated 3 channel driver circuit, can drive R (red), G (green) and B (blue) LED lamp string (LED components in series), or drive the 3 white LED lamp string. Mainly for LCD TV LED backlight, etc..

The product integrates a linear regulator (Linear, Regulator) to + 10 ~ 40V input voltage into a + 5V supply to the internal circuit of IC. In the IC, there are 3 control circuits which can be used to supply voltage stable switching regulator to LED. Peak current mode control.

Switching components (power MOS FET) requires external, but the product is integrated with a gate drive circuit. Support 0.25A source current and 0.5A current. As the circuit of the switching regulator, it can support any type of boost, buck and Inductor (SEPIC:Single Ended Primary).

The switching frequency can be set according to the frequency of the clock signal supplied from the outside. Clock frequency 1/12 for switching frequency. However, the maximum switching frequency is specified as 1MHz.

Dimming function based on analog (linear) signal or PWM signal. Dimming ratio of 5000:1. Package using 40 terminal QFN and terminal 44 QSOP. In the United States when the bulk of the purchase of 1000 units, the use of 40 terminal QFN packaging products for $1.98, using the 44 terminal QSOP packaging products for $2.30.

The input voltage up to 40V LED driver IC