AT8852Z Dual Channel Synchronous Buck PWM Controller
General Description
AT8852Z is a dual channel output synchronous PWM controller IC which drives dual N-channel
MOSFETs in 180 degree phase shift and operated base on ATK patented Fsw Green Mode function to achieve light load high efficiency performance.
AT8852Z is provided in full functions for various applications including adjustable soft start ,free-run
150kHz ; the part is with design od 12V+12V boot strapped driver which is capable to drive MOS with up to
25Amp output current. The part features with full protection functions include POR, OCP, UVP, OVP. The
Power on reset circuit monitors the VCC and OCSET voltage to make sure the supply voltage exceeds the
threshold voltage while controller start running.
The Over current Protection monitors the current drop across the high side MOS`s Rdson ,while the output current reaches the trip point, the controller will stop switching.
Under voltage Protection and Over voltage protection monitor the FB pin for Vout short circuit(to gnd or VIn)
protection when output voltage is under 50% or over 120% of normal output voltage.
The devices is available in SOP-16L package and require few external devices for operation.
AT8852Z Dual Channel Synchronous Buck PWM Controller