Fairchild FSL137H service manual

FSL137H Green Mode Fairchild Power Switch (FPS™)

FSL137H — Green Mode Fairchild Power Switch (FPS™)

September 2010

Features

 Built-in 5ms Soft-Start Function  Internal Avalanche Rugged 700V SenseFET  Low Audio Noise  High-Voltage Startup  Fixed PWM Frequency at 100KHz  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 (OLP)  V  V

Under-Voltage Lockout (UVLO)

Over-Voltage Protection (OVP)

 Constant Power Limit (Full AC Input Range)  Internal OTP Sensor with Hysteresis

Applications

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

 SMPS for VCR, SVR, STB, DVD & VCD Player,

Printer, Facsimile, & Scanner

 Adapter for Camcorder

Description

The highly integrated FSL137H 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. The green-mode function enables the power supply to meet international power conservation requirements. With the internal high-voltage startup circuitry, the power loss due to bleeding resistors is also eliminated. To further reduce power consumption, the PWM controller is manufactured using the BiCMOS process, which allows an operating current of only 3.5mA.

The FSL137H built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary external line compensation ensures constant output power limit over a wide AC input voltage range, from 90V

The FSL137H 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-circuit failure occurs. PWM output is disabled until V limit, when the controller starts up again. As long as V exceeds ~28V, the internal OVP circuit is triggered.

Compared to a discrete MOSFET and controller or RCC switching converter solution, the FSL137H reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability. These devices provide a basic platform well suited for design of cost-effective flyback converters.

to 264VAC.

drops below the UVLO lower

Ordering Information

Part Number SenseFET

FSL137HNY 3.0A 700V -40°C to +105°C 8-Pin Dual In-Line Package (DIP) Tube

Operating Temperature

Range

Package

Packing

Method

Application Diagram

Drain

VIN

GNDVDDFB

Figure 1. Typical Flyback Application

FSL137H — Green Mode Fairchild Power Switch (FPS™)

Output Power Table

Product

(1)

Adapter

(2)

± 15%

230V

(3)

Open Frame

85-265VAC

(4)

Adapter

(3)

Open Frame

FSL137H 17.5W 25W 13W 19W

Notes:

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

2. 230 V

or 100/115 V

with doublers.

3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink, at T

=50°C ambient.

4. Maximum practical continuous power in an open-frame design with sufficient drain pattern as a heat sink, at T

=50°C ambient.

Internal Block Diagram

(4)

Figure 2. Internal Block Diagram

Pin Configuration

FSL137H — Green Mode Fairchild Power Switch (FPS™)

Pin Definitions

Pin # Name Description

1 GND

2 VDD

3 FB

4 VIN

5 HV

6 Drain

7 Drain

8 Drain

Ground. SenseFET source terminal on primary side and internal controller ground. Power Supply. The internal protection circuit disables PWM output as long as V

OVP trigger point.

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.

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

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.

Startup. For startup, this pin is pulled HIGH to the line input or bulk capacitor via resistors. SenseFET Drain. High-voltage power SenseFET drain connection. SenseFET Drain. High-voltage power SenseFET drain connection. SenseFET Drain. High-voltage power SenseFET drain connection.

F – Fairchild Logo

Z – Plant Code X – 1-Digit Year Code Y – 1-Digit Week Code TT – 2-Digit Die Run Code T – Package Type (N: DIP)

P – Y: Green Package

M – Manufacture Flow Code

Figure 3. Pin Configuration

exceeds the

FSL137H — Green Mode Fairchild Power Switch (FPS™)

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

Drain Pin Voltage

DRAIN

IDM Drain Current Pulsed

EAS Single Pulsed Avalanche Energy

DC Supply Voltage 30 V

VDD

VFB FB Pin Input Voltage -0.3 7.0 V

VIN Pin Input Voltage -0.3 7.0 V

VIN

VHV HV Pin Input Voltage 700 V

Power Dissipation (T

θJA Junction-to-Air Thermal Resistance

ΨJT Junction-to-Top Thermal Resistance

TJ Operating Junction Temperature

Storage Temperature Range

STG

TL Lead Temperature (Wave Soldering or IR, 10 Seconds)

ESD

Electrostatic Discharge Capability, All Pins Except HV Pin

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 T

9. Measured on the package top surface.

10. All pins including HV pin: HBM=1kV, CDM=1.25kV

(5, 6)

700 V

(7)

12 A

(8)

230 mJ

= 25°C.

＜50°C)

(10)

(9)

Human Body Model: JESD22-A114 4.5

Charged Device Model: JESD22-C101 1.5

-55

1.5 W

+150

150

+260

°C/W

°C

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

FSL137H — Green Mode Fairchild Power Switch (FPS™)

Electrical Characteristics

VDD=15V, TA=25°C unless otherwise specified.

Symbol Parameter Conditions Min. Typ. Max. Unit

SenseFET Section

Drain-Source Breakdown Voltage VGS = 0V 700 V

DSS

Zero-Gate-Voltage Drain Current

DSS

Drain-Source On-State Resistance

DS(ON)

Input Capacitance

ISS

Output Capacitance

OSS

Reverse Transfer Capacitance

RSS

Turn-On Delay Time VDS = 350V, ID = 1.0A 11.2 33.0 ns

d(on)

tr Rise Time VDS = 350V, ID = 1.0A 34 78 ns

Turn-Off Delay Time VDS = 350V, ID = 1.0A 28.2 67.0 ns

d(off)

tf Fall Time VDS = 350V, ID = 1.0A 32 74 ns

VDD Section

VOP Continuously Operating Voltage 22 V

Start Threshold Voltage 11 12 13 V

DD-ON

Minimum Operating Voltage 7 8 9 V

DD-OFF

Startup Current V

DD-ST

Operating Supply Current VDD = 15V, VFB = 3V 3.0 3.5 4.0 mA

DD-OP

DD-BM

Internal Sink Current

DD-OLP

TH-OLP

VDD Over-Voltage Protection 27 28 29 V

DD-OVP

D-VDDOVP

HV Section

IHV Maximum Current Drawn from HV Pin

Leakage Current After Startup

HV-LC

Oscillator Section

Frequency in Nominal Mode

OSC

Green-Mode Frequency 14 18 22 kHz

OSC-G

Maximum Duty Cycle 85 %

MAX

fDV Frequency Variation vs. VDD Deviation VDD = 9V to 22V 5 %

fDT

(11)

VDS = 700V, VGS = 0V 0.5 50.0

VDS = 560V, VGS = 0V, T

= 125°C

(12)

VGS = 10V, ID = 0.5A 4.00 4.75 Ω

VGS = 0V, VDS = 25V, f = 1MHz

= 0V, VDS = 25V,

f = 1MHz

VGS = 0V, VDS = 25V, f = 1MHz

– 0.16V 30 µA

DD-ON

Green-Mode Operating Supply Current

Off Voltage 5 6 7 V

DD-OLP

Over-Voltage Protection

Debounce Time

VFB = V

TH-OLP

2 mA

FB-G

+0.1V

75 130 200 µs

HV 120V V

= 0V with 10µF

HV = 700V, V

= V

DD-OFF

+1V

Center Frequency

Frequency Variation vs. Temperature Deviation

(11)

= -40 to +105°C

1 200

315 410 pF

47 61 pF

9 14 pF

30 60 90 µA

1.5 3.5 5.0 mA

1 20

94 100 106 kHz

5 %

μA

µA

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