虹原科技股份有限公司

General Description
AT8853Z is a single channel output synchronous PWM controller IC which drives dual N-channel
MOSFETs.
AT8853Z is provided in full functions for various applications including adjustable soft start ,free-run
150kHz and also could be adjust by RT pin; the part is with design in 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-14L package and require few external devices for operation.

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.

General Description
AT2003S is a wide input voltage, high efficiency stepdown DC/DC converter that operates in either CV (ConstantOutput Voltage) mode or CC (Constant OutputCurrent) mode.
AT2003S provides up to 3A output current at 120kHz switching frequency ,and the CC level can be
adjusted by changing external sensing resister.
The AT2003S provides full protection functions, thermal shutdown is to prevent over temperature operating from damage; cycle by cycle current limit is against over current operating of the switch; and over voltage protection(OVP) that can avoid high Vout voltage to damage circuit and capacitor.
The devices is available in PSOP8-8L package and require very few external devices for operation.

General Description
AT6301Z is a resonant controller IC to drive half bridge or full bridge base on ATK patented control method to achieve superior dynamic and efficiency performance. With different setups on driver pin,AT6301Z could operate in single/interleaved SRC/LLC half/full bridge architecture. For simplicity, this datasheet describes interleaved SRC/LLC half/full bridge application only.
Synchronous rectifier control is provided to achieve high efficiency and to reduce system complexity. Besides programmable frequency, dead time between primary side drivers (TDPR) and load dependent delay time of secondary side driver (TDSR) are adjustable to further improve efficiency.
The AT6301Z also contains green frequency modulation (GFM) operation. It reduces switching duty cycle and frequency in light load to improve efficiency.

General Description
AT6201Z is an advanced active power factor corrected controller that integrates two 180 out of phase PWM to drive PFC boost stages base on ATK patented Pseudo Digital Loop(PDL) control method.
In PDL control ,AT6201Z classically operates in Critical conduction Mode(CRM) when the inductor current
below a programmable value.When the current is exceed this preset level ,the AT6201Z natural change to Continuous conduction Mode(CCM).The loop stability and response is controlled by PDL.
AT6201Z features a robust suite of protection features to properly handle an array of power supply operating and fault condition.
The devices is available in TSSOP-20L package and require few external devices for operation.

General Description
AT6103Z is an active power factor corrected controller to drive PFC boost stages base on ATK
patented Pseudo Digital Control (PDC) method.
In PDC loop, AT6103Z could operates in traditional fixed frequency operation for Continuous Conduction
Mode (CCM) in heavy loading and Discontinuous Conduction Mode (DCM) in lighter loading.
By optionally utilizing ZCD pin to sensing demagnetization of inductance, AT6103Z could also
operates in Critical Conduction Mode (CRM).
The loop stability and response of these multi-mode operations is well controlled by PDC Loop. AT6103Z
features a robust suite of protection features to properly handle an array of power supply operating and fault
condition.
The devices is available in SOP-14L package and requires few external devices for operation.

General Description
AT6902Z is a secondary side Synchronous Rectification driver IC to drive SR MOS replaces Schottky rectification diode for higher efficiency. With adaptive dead time control method, AT6902Z could operates in DCM and CCM safely without cross conduction issue. In system light load condition, AT6902Z enter light load mode and stop Gate switching result to less standby power loss.
The devices is available in SOP-8L package and require few external devices for operation.

General Description
AT1688Z is a highly integrated quasi-resonant (QR) mode PWM control for flyback converter, optimized for high
performance, low standby power consumption and cost effective offline flyback converter applications.
The AT1688Z internal valley detector ensures minimum drain voltage switching at QR operation. At low line and
heavy loading, it operates in continuous conduction mode(CCM) via an external resistor sets minimum fixed frequency.
At high line and normal loading, it operates in QR mode. When light load, it operates in pulse frequency
modulation (PFM) mode. When the output power falls below a given level, it enters the burst mode.
The AT1688Z built-in multiple protection with VCC under voltage lockout (UVLO), VCC over voltage protection
(OVP), VCC clamp, GATE clamp, internal over temperature protection (OTP), Output over voltage protection, DEM
high level protection, cycle-by-cycle current limiting (OCP), over load protection (OLP), X-cap discharge, brown in/out
protection, and leading-edge blanking (LEB) of the current sensing to prevent circuit damage occurred under abnormal
conditions.
The AT1688Z is available in an SOP-10L package and require very few external devices for operation.