Fairchild FSBH0F70A, FSBH0170, FSBH0170A, FSBH0270, FSBH0270A service manual

April 2010

FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370

Green Mode Fairchild Power Switch (FPS™)

Features

Description

Brownout Protection with Hysteresis

Built-In 5ms Soft-Start Function

Internal Avalanche-Rugged 700V SenseFET

No Acoustic Noise During Light-Load Operation

High-Voltage Startup

Linearly Decreasing PWM Frequency to 18KHz

Peak-Current-Mode Control

Cycle-by-Cycle Current Limiting

Leading-Edge Blanking (LEB)

Synchronized Slope Compensation

Internal Open-Loop Protection

VDD Under-Voltage Lockout (UVLO)

VDD Over-Voltage Protection (OVP)

Internal Auto-Restart Circuit (OVP, OTP)

Constant Power Limit (Full AC Input Range)

Internal OTP Sensor with Hysteresis

VIN Pin for Pull-HIGH Latch Function and PullLOW Auto-Recovery Protection

Applications

General-purpose switch-mode power supplies and flyback power converters, including:

Auxiliary Power Supply for PC and Server

SMPS for VCR, SVR, STB, DVD & DVCD Player, Printer, Facsimile, and Scanner

Adapter for Camcorder

The highly integrated FSBH-series consists of an integrated current-mode Pulse Width Modulator (PWM) and an avalanche-rugged 700V SenseFET. It is specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components.

The integrated PWM controller features include a proprietary green-mode function that provides off-time modulation to linearly decrease the switching frequency at light-load conditions to minimize standby power consumption. To avoid acoustic-noise problems, the minimum PWM frequency is set above 18kHz. This green-mode function enables the power supply to meet international power conservation requirements. The PWM controller is manufactured using the BiCMOS process to further reduce power consumption. The FSBH-series turns off some internal circuits to improve power saving when VFB is lower than 1.6V, which allows an operating current of only 2.5mA.

The FSBH-series has built-in synchronized slope compensation to achieve stable peak-current-mode control. The proprietary external line compensation ensures constant output power limit over a wide AC input voltage range, from 90VAC to 264VAC.

The FSBH-series provides many protection functions. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety when an open-loop or output short occurs. PWM output is disabled until VDD drops below the VTH-OLP, then the controller starts up again. As long as VDD exceeds 28V, the internal OVP circuit is triggered.

Compared with a discrete MOSFET and controller or RCC switching converter solution, the FSBH-series reduces total component count, design size, and weight; while increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for the design of costeffective flyback converters, such as in PC auxiliary power supplies.

(FPS™) Switch Power Fairchild Mode Green — FSBH0370 FSBH0270/A, FSBH0170/A, FSBH0F70A,

© 2009 Fairchild Semiconductor Corporation	www.fairchildsemi.com
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3

Ordering Information

	Part Number	Sense FET	Operating	VIN Pin	Package	Packing
			Temperature Range	(PIN #4)		Method
	FSBH0F70ANY	0.5A 700V	-40°C to +105°C
	FSBH0170ANY	1.0A 700V	-40°C to +105°C	Not Available
	FSBH0270ANY	2.0A 700V	-40°C to +105°C		8-Pin Dual In-Line	Tube
	FSBH0170NY	1.0A 700V	-40°C to +105°C		Package (DIP)
	FSBH0270NY	2.0A 700V	-40°C to +105°C	Enabled
	FSBH0370NY	3.0A 700V	-40°C to +105°C

Application Diagram

HV Drain

VIN

FB VDD GND

Figure 1. Typical Flyback Application

Output Power Table (1)

Product	230VAC ± 15%(2)			85-265VAC
	Adapter(3)	Open Frame(4)	Adapter(3)		Open Frame(4)
FSBH0F70A	7W	10W	6W		8W
FSBH0170/A	10W	15W	9W		13W
FSBH0270/A	14W	20W	11W		16W
FSBH0370	17.5W	25W	13W		19W

Notes:

1.The maximum output power can be limited by junction temperature.

2.230 VAC or 100/115 VAC with doublers.

3.Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink at 50°C ambient.

4.Maximum practical continuous power in an open-frame design with sufficient drain pattern as a heat sink at 50°C ambient.

(FPS™) Switch Power Fairchild Mode Green — FSBH0370 FSBH0270/A, FSBH0170/A, FSBH0F70A,

© 2009 Fairchild Semiconductor Corporation	www.fairchildsemi.com
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3	2

Internal Block Diagrams

Figure 2. FSBH0170, FSBH0270, FSBH0370 Internal Block Diagram

Figure 3. FSBH0F70A, FSBH0170A, FSBH0270A Internal Block Diagram

(FPS™) Switch Power Fairchild Mode — Green FSBH0370 FSBH0270/A, FSBH0170/A, FSBH0F70A,

© 2009 Fairchild Semiconductor Corporation	www.fairchildsemi.com
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3	3

Pin Configuration

8

8

F – Fairchild Logo

Z – Plant Code

ZXYTT

ZXYTT

X – 1-Digit Year Code

BH0F70A

BH0170A

Y – 1-Digit Week Code

TPM

TPM

TT – 2-Digit Die Run Code

T – Package Type (N:DIP)

1

1

P – Y: Green Package

M – Manufacture Flow Code

8

8

ZXYTT

ZXYTT

BH0270A

BH0170

TPM

TPM

1

1

8

8

ZXYTT

ZXYTT

BH0270

BH0370

TPM

TPM

1

1

Figure 4. Pin Configuration and Top Mark Information

Pin Definitions

Pin #

Name

Description

1

GND

Ground. SenseFET source terminal on primary side and internal controller ground.

2

VDD

Power Supply. The internal protection circuit disables PWM output as long as VDD exceeds the

OVP trigger point.

3

FB

Feedback. The signal from the external compensation circuit is fed into this pin. The PWM duty

cycle is determined in response to the signal on this pin and the internal current-sense signal.

VIN

Line-Voltage Detection. The line-voltage detection is used for brownout protection with

4

hysteresis and constant output power limit over universal AC input range. This pin has additional

protections that are pull-HIGH latch and pull-LOW auto recovery, depending on the application.

NC

No Connection for FSBH0F70A, FSBH0170A and FSBH0270A.

5

HV

Startup. For startup, this pin is pulled HIGH to the line input or bulk capacitor via resistors.

6

Drain

SenseFET Drain. High-voltage power SenseFET drain connection.

7

Drain

SenseFET Drain. High-voltage power SenseFET drain connection.

8

Drain

SenseFET Drain. High-voltage power SenseFET drain connection.

(FPS™) Switch Power Fairchild Mode Green — FSBH0370 FSBH0270/A, FSBH0170/A, FSBH0F70A,

© 2009 Fairchild Semiconductor Corporation	www.fairchildsemi.com
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3	4

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.

Symbol	Parameter				Min.	Max.	Unit
VDRAIN	Drain Pin Voltage(5,6)			FSBH0x70/A		700	V
				FSBH0F70A		1.5
IDM	Drain Current Pulsed(7)			FSBH0170/A		4.0	A
				FSBH0270/A		8.0
				FSBH0370		12.0
				FSBH0F70A		10
EAS	Single Pulsed Avalanche Energy(8)			FSBH0170/A		50	mJ
				FSBH0270/A		140
				FSBH0370		230
VDD	DC Supply Voltage					30	V
VFB	FB Pin Input Voltage				-0.3	7.0	V
VIN	VIN Pin Input Voltage				-0.3	7.0	V
VHV	HV Pin Input Voltage					700	V
PD	Power Dissipation (TA 50°C)					1.5	W
θJA	Junction-to-Air Thermal Resistance					80	°C/W
θJC	Junction-to-Case Thermal Resistance					20	°C/W
TJ	Operating Junction Temperature				Internally limited(9)		°C
TSTG	Storage Temperature Range				-55	+150	°C
TL	Lead Temperature (Wave Soldering or IR, 10 Seconds)					+260	°C
			Human Body Model:		3
	Electrostatic Discharge Capability,		JESD22-A114
ESD							kV
	All pins except HV pin		Charged Device Model:		1
			JESD22-C101
Notes:

5.All voltage values, except differential voltages, are given with respect to the network ground terminal.

6.Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.

7.Non-repetitive rating: pulse width is limited by maximum junction temperature.

8.L = 51mH, starting TJ = 25°C.

9.Internally Limited of TJ refers to TOTP

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings.

Symbol	Parameter	Conditions	Min.	Typ.	Max.	Unit
TA	Operating Ambient Temperature		-40		+105	°C

(FPS™) Switch Power Fairchild Mode Green — FSBH0370 FSBH0270/A, FSBH0170/A, FSBH0F70A,

© 2009 Fairchild Semiconductor Corporation	www.fairchildsemi.com
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3	5