Fairchild FSD156MRBN service manual

FSD156MRBN
Green-Mode Fairchild Power Switch (FPS™)

FSD156MRBN — Green-Mode Fairchild Power Switch (FPS™)

October 2011

Features



Advanced Soft Burst-Mode Operation for
Low Standby Power and Low Audible Noise

 Random Frequency Fluctuation (RFF) for Low EMI
 Pulse-by-Pulse Current Limit
 Various Protection Functions: Overload Protection

(OLP), Over-Voltage Protection (OVP), Abnormal
Over-Current Protection (AOCP), Internal Thermal
Shutdown (TSD) with Hysteresis, Output-Short
Protection (OSP), and Under-Voltage Lockout
(UVLO) with Hysteresis

 Low Operating Current (0.4mA) in Burst Mode
 Internal Startup Circuit
 Internal High-Voltage SenseFET: 650V
 Built-in Soft-Start: 15ms
 Auto-Restart Mode

Applications

 Power Supply for LCD Monitor, STB, and DVD

Combination

Description

The FSD156MRBN is an integrated Pulse Width
Modulation (PWM) controller and SenseFET specifically
designed for offline Switch-Mode Power Supplies
(SMPS) with minimal external components. The PWM
controller includes an integrated fixed-frequency
oscillator, Under-Voltage Lockout (UVLO), Leading­Edge Blanking (LEB), optimized gate driver, internal
soft-start, temperature-compensated precise current
sources for loop compensation, and self-protection
circuitry. Compared with a discrete MOSFET and PWM
controller solution, the FSD series can reduce total cost,
component count, size, and weight; while
simultaneously increasing efficiency, productivity, and
system reliability. This device provides a basic platform
suited for cost-effective design of a flyback converter.

Ordering Information

(2)

Output Power Table

Operating

Part Number Package

Junction

Temperature

FSD156MRBN 8-DIP

Notes:

1. Lead-free package per JEDEC J-STD-020B.

2. The junction temperature can limit the maximum output power.

3. 230V

4. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient temperature.

5. Maximum practical continuous power in an open-frame design at 50C ambient temperature.

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSD156MRBN • Rev. 1.0.0

or 100/115VAC with voltage doubler.

AC

-40°C ~
+125°C

Current

Limit

1.60A

R

DS(ON)

(Max.)

2.3

230VAC ±15%

Adapter

(4)

26W 40W 20W 30W

(3)

Open

Frame

Adapter

(5)

85-265V

(4)

Frame

AC

Open

Replaces

Device

(5)

FSFM300N

FSGM300

Application Circuit

FSD156MRBN — Green-Mode Fairchild Power Switch (FPS™)

Figure 1. Typical Application Circuit

Internal Block Diagram

Figure 2. Internal Block Diagram

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSD156MRBN • Rev. 1.0.0 2

Pin Configuration

FSD156MRBN — Green-Mode Fairchild Power Switch (FPS™)

1. GND

2. V

CC

FSD156MRBN

3. FB

4. N.C.

Figure 3. Pin Configuration (Top View)

Pin Definitions

Pin # Name Description

1 GND

2 VCC

3 FB

4 NC

5, 6, 7, 8 Drain

Ground. This pin is the control ground and the SenseFET source.

Power Supply. This pin is the positive supply input, which provides the internal operating

current for both startup and steady-state operation.

Feedback. This pin is internally connected to the inverting input of the PWM comparator.
The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor
should be placed between this pin and GND. If the voltage of this pin reaches 7.0V, the
overload protection triggers, which shuts down the FPS™.

No Connection

SenseFET Drain. High-voltage power SenseFET drain connection.

8. Drain

7. Drain

6. Drain

5. Drain

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSD156MRBN • Rev. 1.0.0 3

FSD156MRBN — 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

V

Drain Pin Voltage 650 V

DS

V

V

CC

V

Feedback Pin Voltage

FB

I

Drain Current Pulsed 4 A

DM

I

Continuous Switching Drain Current

DS

EAS Single Pulsed Avalanche Energy

PD

T

J

T

Storage Temperature

STG

ESD

Notes:

6. Repetitive peak switching current when the inductive load is assumed: Limited by maximum duty (D

and junction temperature (see Figure 4).

7. L=45mH, starting T

8. Infinite cooling condition (refer to the SEMI G30-88).

9. Although this parameter guarantees IC operation, it does not guarantee all electrical characteristics.

Pin Voltage 26 V

CC

Total Power Dissipation (TC=25C)

-0.3

T

=25C

(6)

C

TC=100C

(7)

190 mJ

(8)

1.9 A

1.27 A

1.5 W

10.0 V

Maximum Junction Temperature 150

Operating Junction Temperature

Electrostatic
Discharge Capability

=25C.

J

Human Body Model, JESD22-A114 5

Charged Device Model, JESD22-C101 2

(9)

-40

-55

+125

+150

MAX

C

C

C

kV

=0.73)

Figure 4. Repetitive Peak Switching Current

Thermal Impedance

TA=25°C unless otherwise specified.

Symbol Parameter Value Unit

JA Junction-to-Ambient Thermal Impedance

JL Junction-to-Lead Thermal Impedance

Notes:

10. JEDEC recommended environment, JESD51-2, and test board, JESD51-10, with minimum land pattern.

11. Measured on the SOURCE pin #7, close to the plastic interface.

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSD156MRBN • Rev. 1.0.0 4

(10)

85 °C/W

(11)

11 °C/W

FSD156MRBN — Green-Mode Fairchild Power Switch (FPS™)

Electrical Characteristics

TJ = 25C unless otherwise specified.

Symbol Parameter Conditions Min. Typ. Max. Unit

SenseFET Section

BV

Drain-Source Breakdown Voltage

DSS

I

Zero-Gate-Voltage Drain Current

DSS

R

Drain-Source On-State Resistance VGS=10V, ID =1A 1.8 2.2 

DS(ON)

C

Input Capacitance

ISS

C

Output Capacitance

OSS

(12)

V

(12)

V

tr Rise Time V

tf Fall Time V

t

Turn-On Delay V

d(on)

t

Turn-Off Delay V

d(off)

V

= 0V, ID = 250A

CC

V

= 650V, TA = 25C

DS

= 25V, V

DS

= 25V, V

DS

= 325V, ID = 4A, RG=25 26 ns

DS

= 325V, ID = 4A, RG=25 25 ns

DS

= 325V, ID = 4A, RG=25 14 ns

DS

= 325V, ID= 4A, RG=25 32 ns

DS

= 0V, f=1MHz 515 pF

GS

= 0V, f=1MHz 75 pF

GS

Control Section

f

Switching Frequency

S

f

D

MAX

D

MIN

Switching Frequency Variation

S

Maximum Duty Ratio V

Minimum Duty Ratio V

IFB Feedback Source Current V

V

START

V

STOP

t

V

RECOMM

SS

UVLO Threshold Voltage

After Turn-on, V

Internal Soft-Start Time V

Recommended VCC Range 13 23 V

(12)

V

(12)

= 14V, V

CC

-25C < T

= 14V, V

CC

= 14V, V

CC

= 0 65 90 115

FB

V

= 0V, V

FB

= 40V, V

STR

= 4V 61 67 73 kHz

FB

< 125C

J

= 4V 61 67 73 %

FB

= 0V 0 %

FB

Sweep 11 12 13 V

CC

= 0V 7.0 7.5 8.0 V

FB

Sweep 15 ms

CC

Burst-Mode Section

V

BURH

V

BURL

Burst-Mode Voltage V

0.30 0.35 0.40 V

= 14V, VFB Sweep

CC

Hys 150 mV

Protection Section

I

Peak Drain Current Limit

LIM

V

Shutdown Feedback Voltage V

SD

I

Shutdown Delay Current V

DELAY

t

Leading-Edge Blanking Time

LEB

V

Over-Voltage Protection VCC Sweep 23.0 24.5 26.0 V

OVP

t

OSP

V

OSP

t

OSP_FB

TSD

T

HYS

Output-Short

Threshold VFB 1.8 2.0 2.2 V

Protection

V

Thermal Shutdown Temperature

Hysteresis 60

Threshold Time

(12)

FB

Blanking Time 2.0 2.5 3.0

(12,14)

di/dt = 300mA/s

= 14V, V

CC

= 14V, V

CC

Sweep 6.45 7.00 7.55 V

FB

= 4V 1.2 2.0 2.8

FB

300 ns

OSP Triggered when
t
(Lasts Longer than t

Shutdown Temperature 125 135 145

(12)

ON<tOSP

& VFB>V

OSP

OSP_FB

650 V

250

±5 ±10 %

0.45 0.50 0.55 V

1.45 1.60 1.75 A

0.7 1.0 1.3

)

Continued on the following page…

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© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSD156MRBN • Rev. 1.0.0 5