功能性IC

General Description
The AT1051 is a high efficiency, low BOM cost FAN controller for PC and Server Power Supply. It could real
time feedback both Mother Board and Power Supply temperature signals through TSET and FANCMD setting.
TSET connect a thermistor to gnd, and a resister to TEAO to seting the analog thermal feedback voltage, The TEAO voltage decide the PWM duty signal to control the FAN speed from PWMO. The Mother Board thermal information usually is duty PWM signal, the signal would input to controller from FANCMD and integrated to a DC voltage to decide the feedback duty cycle to PWMO to modulate the FAN speed.
AT1051 also integrated a boost convertor inside the chip.
When Power Supply temperature increased and result in TEAO larger than 3.6V the boost loop would be
enable.
AT1051 would enter turbo boost mode to boost VCC up to 16V to speed up the FAN. And if the tempture
is so high that TEAO is larger than 3.8V, PGO would be pull low to shutdown the Power system.
( Patent Protected )

General Description
The AT1002Z is a highly integrated solution for PSU(power supply unit) application requiring a remote sense feedback to regulate the feedback voltage. AT1002Z integrates two Op-Amps and a 1msec counter to control the sequence of the chip.
It is designed to allow for operating a wide supply voltage range from 8V to 24V. The internal excellent offset
voltage cancellation mechanism makes the low offset voltage have good line regulation with flexible external
supply voltage design. The devices are available in SOT23-8L packages and require very few external devices for operation.
( Patent Protected )

General Description
The AT1001Z is a three channel data demodulator that transfer the analog input signal into a PWM duty signal for the followed EMP(energy measurement processor).
The fourth output signal provide the phase shift information between channel one and two. AT1001Z is designed to allow for operating a wide supply voltage range from 4.5V to 24V.
The internal excellent linrarity modulation mechanism makes the converting have good line regulation with flexible external supply voltage design. The PWM signal is operated in a 5kHz switching frequency and a fixed 2k output driving impedance. The devices are available in PSOP-8L packages and require very few external devices for operation.
( Patent Protected )