KP1601X is a high efficiency Buck LED power switch designed for LED backlight. It adopts quasi-resonant control mode and integrates accurate zero-crossing detection of inductor current, which can work efficiently and obtain good EMI performance. KP1601SGA is a controller, KP16015SGA integrates a 150V Power MOSFET and KP16017SGA integrates 250V power MOSFET.
KP1601X adopt two dimming functions, which have accurate dimming control of the LED in a wide range, and through the design of a new PWM chopper dimming circuit, to avoid current overshot of LED and caused output capacitor noise. Due to the high requirement of current accuracy of LED backlight, chopper mode is adopted for current sampling operational amplifier design to reduce the imbalance and better match the sampling and reference. The two dimming modes are HPWM analog dimming and LPWM chopper dimming, which can control the dimming range from 1% to 100% respectively.
KP1601X offers comprehensive protection features to protect the system in various fault conditions such as VDD UVLO, LED open protection, LED short circuit protection, LED- to GND short circuit, Inductor and Diode short circuit protection, CS open protection, Drain to CS short circuit protection, cycle by cycle current limit (OCP), over temperature protection (OTP), leading edge blanking (LEB) etc.
KP1601X adopts a unique LED current control, and could achieve very good response for input voltage variation; when the system power supply gets a load jump, the fluctuation of the LED current is small.
Comparing with the competitors’ products, KP1601X features deep dimming depth, stable operation and reliable protections.