Datasheet > FAN604HMX

FAN604HMX

更新时间： 2023-09-03 20:30:32

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
23页	1366K
描述
Offline Quasi-Resonant PWM Controller

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数据手册

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FAN604HMX 数据手册

FAN604H

Start-up

Burst/Green

Mode

V_FB

Brown IN

VDD UVLO

17.2V/5.5V

VDD UVLO

V_NVS

Brown OUT

V_DDOVP Fault

V_SUVP Fault

V_SOVP Fault

Auto-Restart

Protection

OTP Fault

V_CSFault

SD Fault

VDD

Debounce

VDD OVP Fault

V_VDD-OVP

GND 10

V_SOVP Fault

V_SUVP Fault

V_{S_SH}

S/H

VS Protection

VDD

Maximum

On Time

S/H = Sampling and Hold

Driver

Control

GATE

Forced Frequency

Modulation

OSC

CLK

Valley

Detection

V_FB

V_NVS

t_DIS

I_SD

V_CS-LIM

V_CSFault

Protection

SD Fault

V_SD-TH

I_COMP

V_CS

LEB

5.25V

Z_FB

V_CS

Peak Current

V_CS

t_DIS

A_V-CC

I_OEstimator

I_CCR

A_V

V_CCR

CCR

Figure 2 FAN604H Block Diagram

PIN FUNCTION DESCRIPTION

Pin No.

Pin Name

Description

High Voltage. This pin connects to DC bus for high-voltage startup.

No Connect.

Current Sense. This pin connects to a current-sense resistor to sense the MOSFET current for Peak-Current-Mode

control for output regulation. The current sense information is also used to estimate the output current for CC

regulation.

PWM Signal Output. This pin has an internal totem-pole output driver to drive the power MOSFET. The gate

driving voltage is internally clamped at 14.5V.

GATE

VDD

Power Supply. IC operating current and MOSFET driving current are supplied through this pin. This pin is typically

connected to an external VDD capacitor.

Voltage Sense. The VS voltage is used to detect resonant valleys for quasi-resonant switching. This pin detects

the output voltage information and diode current discharge time based on the auxiliary winding voltage. It also

senses input voltage for Brown-out protection.

Constant Current Reference. This pin connects to external resistor to program the reference voltage of constant

output current.

CCR

Shut Down. This pin is implemented for external over-temperature-protect by connecting NTC thermistor.

Feedback. Typically Opto-Coupler is connected to this pin to provide feedback information to the internal PWM

comparator. This feedback is used to control the duty cycle in CV regulation.

GND

Ground.

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