Intelligent Multi-Mode Flyback Controller

HY1602A

Application

Offline Charger
TV / Monitor Standby Power
Notebook Adapter

DESCRIPTION

     HY1602 is an intelligent digital multi-mode Flyback controller. The newly developed architecture supports Constant Voltage (CV), Constant Current (CC) and over load (LPS) for maximum 64ms.

     HY1602 integrates rich protections and features such as line compensation, slope compensation, transformer short protection, output over-voltage protection, over-temperature protection, brown in and brown-out, sense resistor short protection. HY1602 has 4 options: HY1602A (65kHz, CV/LPS, on chip OTP), HY1602B (89kHz, CV/LPS, on chip OTP), HY1602C (65kHz, CV/LPS, on chip OTP and external NTC OTP), HY1602D (89kHz, CV/LPS, on chip OTP and external NTC OTP).

     HY1602 is available with the SOT23 package.

FEATURES

·  Intelligent Digital Multi-Mode Control

·  Peak Current Mode Control at Burst-Mode /PFM/DCM/CCM

·  Continuous-Conduction Mode (CCM) at Low Line(LL), QR at High Line(HL) to Balance the Switching Loss and the Conduction Loss

·  Over-load Period up to 64mS (option)

·  Output Constant Current Regulation  

·  Switching Frequency Dithering to Improve EMI   

·  Adaptive MOSFET Gate Drive to Balance Switching Loss and EMI

·  MOSFET Gate Voltage is Clamped at 12V

·  Rich Protection Features  

§  Output OVP with Latch

§  VCC OVP with Latch

§  Transformer Saturation Protection

§  Output Short Circuit Protection   

§  Current Sensor Resistor Short Protection

§  Output Open Loop Protection

·   Line Feed-forward Compensation

·   Brown-in and Brown-out

·   Power Consumption < 75mW

·   Low Start-up Current (<3µA)

图片1.png

                                             Fig 2. Typical Application Circuit

HY1602 Version Table


Version

HY1602A

HY1602B

HY1602C

HY1602D

Feature

CV/CC/LPS

CV/CC/LPS

CV/CC/LPS

CV/CC/LPS

Operation Mode

No-Load: Burst

LL:  DCM/CCM

HL: QR

No-Load: Burst

LL:  DCM/CCM

HL: QR

No-Load: Burst

LL:  DCM/CCM

HL: QR

No-Load: Burst

LL:  DCM/CCM

HL: QR

Switching Frequency

LL: 65 kHz

HL: 65 kHz

LL: 89 kHz

HL: 89 kHz

LL: 65 kHz

HL: 65 kHz

LL: 89 kHz

HL: 89 kHz

VCC

POR: 16V

UVLO: 7.5V

POR: 16V

UVLO: 7.5V

POR: 16V

UVLO: 7.5V

POR: 16V

UVLO: 7.5V

Adaptive Driver (*)

Adaptive Drive 

12V

Adaptive Drive 
12V

Adaptive Drive 
12V

Adaptive Drive 
12V

Output Peak Current Period

64ms

64ms

 64ms

64ms

Line Voltage Sens

Yes

Yes

Yes

Yes

Brown-in/Out

Yes

Yes

Yes

Yes

Frequency Jittering

+/- 10%

+/- 10%

+/- 10%

+/- 10% 

Protection

Vout_OVP

3.95V(Latch)

3.95V(Latch)2.5V(Latch)2.5V(Latch)

Transformer Saturation Protection

YesYesYesYes

Open Loop Protection

YesYesYesYes

Current Sense Short Protection

YesYesYesYes

Thermal Shutdown (*)

Yes

On chip OTP

Yes

On chip OTP

Yes

On chip OTP & external NTC OTP

Yes

On chip OTP & external NTC OTP

VCC OVP

26V26V26V26V

*Patented Technology 





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Pin Configuration

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1.png

     SOT23-6

Functional Pin Definitions

No.

Name

Description

1

GND

Ground.

2

FB

Voltage loop feedback input. Connect an opto-coupler from the FB pin.

3

VMS

Auxiliary winding detection signal input. It detects the input voltage and output voltage information

4

CS

Current sensing input.

5

VCC

VCC is the supply of IC. The controller is enabled when VCC voltage reaches VCC_ON and disabled when VCC drops below VCC_UVLO.

6

OUT

Gate drive output and NTC detection input  

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