Fairchild FSQ510, FSQ510H, FSQ510M service manual

FSQ510, FSQ510H, and FSQ510M

FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter

January 2009

Green Mode Fairchild Power Switch (FPS™)

for Valley Switching Converter – Low EMI and High Efficiency

Features



Uses an LDMOS Integrated Power Switch

 Optimized for Valley Switching Converter (VSC)
 Low EMI through Variable Frequency Control and

Inherent Frequency Modulation

 High Efficiency through Minimum Drain Voltage

Switching

 Extended Valley Switching for Wide Load Ranges
 Small Frequency Variation for Wide Load Ranges
 Advanced Burst-Mode Operation for Low Standby

Power Consumption

 Pulse-by-Pulse Current Limit
 Protection Functions: Overload Protection (OLP),

Internal Thermal Shutdown (TSD) with Hysteresis

 Under-Voltage Lockout (UVLO) with Hysteresis
 Internal Startup Circuit
 Internal High-Voltage SenseFET: 700V
 Built-in Soft-Start: 5ms

Applications

 Auxiliary Power Supplies for LCD TV, LCD Monitor,

Personal Computer, and White Goods

Description

A Valley Switching Converter (VSC) generally shows
lower EMI and higher power conversion efficiency than
a conventional hard-switched converter with a fixed
switching frequency. The FSQ510 (H or M) is an
integrated valley switching pulse width modulation (VS­PWM) controller and SenseFET specifically designed
for offline switch-mode power supplies (SMPS) for
valley switching with minimal external components. The
VS-PWM controller includes an integrated oscillator,
under-voltage lockout (UVLO), leading-edge blanking
(LEB), optimized gate driver, internal soft-start,
temperature-compensated precise current sources for
loop compensation, and self-protection circuitry.

Compared with discrete MOSFET and PWM controller
solutions, the FSQ510 (H or M) can reduce total cost,
component count, size and weight; while simultaneously
increasing efficiency, productivity, and system reliability.
This device provides a platform for cost-effective designs
of a valley switching flyback converters.

Ordering Information

Operating

Part

Number

FSQ510 7-DIP

FSQ510H 8-DIP

FSQ510M 7-MLSOP

For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

Notes:

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

2. 230V

3. Typical continuous power with a Fairchild charger evaluation board described in this datasheet in a non-

4. Maximum practical continuous power for auxiliary power supplies in an open-frame design at 50°C ambient temperature.

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0

Package

or 100/115VAC with voltage doubler.

AC

ventilated, enclosed adapter housing, measured at 50°C ambient temperature.

Eco

Status

RoHS

Junction

Temperature

-40 to +130°C

Current

Limit

320mA

R

DS(ON)

(MAX)

32Ω

Adapter

Output Power Table

230VAC ± 15%

(3)

5.5W 9W 4W 6W

(2)

85-265VAC

Open

Frame

Adapter

(4)

(1)

(3)

Open

Frame

Replaces

Devices

(4)

FSD210B

FSD210DH

FSD210BM

Application Circuit

AC

FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter

Vo

IN

V

str

D

VS

Sync

-PWM

V

fb

V

cc

GND

Figure 1. Typical Application Circuit

Internal Block Diagram

V

REFVREF

I

3

V

fb

(2)

0.85V / 0.75V

4.7V

delay

OLP

FB

I

6R

0.7V / 0.1V

R

TSD

Sync

4 (3)

200ns

delay

OSC

A/R

V

CC

5 (7)

UVLO V

8.7V / 6.7V

S

Q

R

S

Q

R

360ns

LEB

5ms

S/S

REF

V

str

8 (1)

R

(0.4V)

D

7 (8)

sense

n(m):n stands for the pin number of 7-DIP and 7-MLSOP

m stands for the pin number of 8-DIP

1,2

(4,5,6)
GND

Figure 2. Internal Block Diagram

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0 2

Pin Assignments

FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter

V

str

V

fb

FSQ510H

Sync

GND

Figure 3. Package Diagrams for FSQ510(M) and FSQ510H

Pin Definitions

7-Pin 8-Pin Name Description

1, 2

3 2 V

4 3 Sync

5 7 V

7 8 D High-voltage power SenseFET drain connection.

8 1 V

4, 5, 6 GND This pin is the control ground and the SenseFET source.

This pin is internally connected to the inverting input of the PWM
comparator. The collector of an opto-coupler is typically tied to this

fb

pin. For stable operation, a capacitor should be placed between this
pin and GND. If the voltage of this pin reaches 4.7V, the overload
protection triggers, which shuts down the FPS.

This pin is internally connected to the sync-detect comparator for
valley switching. In normal valley-switching operation, the threshold of
the sync comparator is 0.7V/0.1V.

CC

This pin is the positive supply input. This pin provides internal
operating current for both startup and steady-state operation.

This pin is connected directly, or through a resistor, to the high­voltage DC link. At startup, the internal high-voltage current source

str

supplies internal bias and charges the external capacitor connected
to the V

pin. Once VCC reaches 8.7V, the internal current source is

CC

disabled.

D

V

cc

GND

GND

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0 3

FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter

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

V

STR

V

Drain Pin Voltage 700 V

DS

V

Supply Voltage 20 V

CC

V

FB

V

Sync Pin Voltage -0.3 6.5 V

Sync

P

Total Power Dissipation

D

T

J

T

Storage Temperature -55 +150

STG

Notes:

5. V

is internally clamped at 6.5V (I

FB

6. The maximum value of the recommended operating junction temperature is limited by thermal shutdown.

Pin Voltage 500 V

str

Feedback Voltage Range

7-DIP

7-MLSOP

-0.3

1.38

Internally

Clamped

(5)

8-DIP 1.47

Maximum Junction Temperature +150

Recommended Operating Junction
Temperature

(6)

CLAMP_MAX

<100uA) which has a tolerance between 6.2V and 7.2V.

-40 +140

V

W

°C

°C

Thermal Impedance

TA=25°C unless otherwise specified. Items are tested with the standards JESD 51-2 and 51-10 (DIP).

Symbol Parameter Value Unit

7-DIP, 7-MLSOP

θJA Junction-to-Ambient Thermal Impedance

θJC Junction-to-Case Thermal Impedance

8-DIP

θJA Junction-to-Ambient Thermal Impedance

θJC Junction-to-Case Thermal Impedance

Notes:

7. Free-standing with no heatsink; without copper clad; measurement condition - just before junction temperature
T

enters into TSD.

J

8. Measured on the DRAIN pin close to plastic interface.

(7)

90 °C/W

(8)

13 °C/W

(7)

85 °C/W

(8)

13 °C/W

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0 4

TElectrical Characteristics

T J=25°C unless otherwise specified.

Symbol Parameter Conditions Min. Typ. Max. Unit

SenseFET Section

BV

I

DSS

R

DS(ON)

C

ISS

C

OSS

tr

tf

Control Section

fS

ΔfS

IFB

tBB

tBW

D

MAX

D

MIN

V

START

V

STOP

t

S/S

Burst-Mode Section

V

BURH

V

BURL

HYS

Protection Section

I

LIM

VSD

I

DELAY

t

LEB

TSD

HYS

Synchronous Section

VSH

VSL

t

Sync

Total Device Section

IOP

ICH

V

STR

Note:

9. These parameters, although guaranteed, are not 100% tested in production.

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0 5

Drain-Source Breakdown Voltage

DSS

Zero-Gate-Voltage Drain Current VDS=700V

Drain-Source On-State Resistance

Input Capacitance

Output Capacitance

Rise Time

Fall Time

(9)

(9)

(9)

V

(9)

V

V

V

V

CC

TJ=25°C, ID=180mA

T

=100°C, ID=180mA

J

GS

DS

DS

DS

Initial Switching Frequency VCC=11V, VFB=5V, V

Switching Frequency Variation

(9)

-25°C < T

Feedback Source Current VCC=11V, VFB=0V

V

Switching Blanking Time

Valley Detection Window Time

Maximum Duty Ratio VCC=11V, VFB=3V

Minimum Duty Ratio VCC=11V, VFB=0V

UVLO Threshold Voltage

Internal Soft-Start Time V

(9)

CC

V

sync

VFB=0V, VCC Sweep

After Turn-on, V

STR

=0V, ID=100μA

=11V

=40V

=350V, ID=25mA

=350V, lD=25mA

< 125°C

J

=11V, VFB=1V,

Frequency Sweep

=0V

FB

=40V, VCC Sweep

sync

=0V

700 V

150

28 32 

42 48 

96 pF

28 pF

100 ns

50 ns

87.7 94.3 100.0 kHz

±5 ±8 %

200 225 250

7.2 7.6 8.2

3.0

54 60 66 %

0 %

8.0 8.7 9.4 V

6.0 6.7 7.4 V

3 5 7 ms

0.75 0.85 0.95 V

Burst-Mode Voltage VCC=11V, VFB Sweep

0.65 0.75 0.85 V

100 mV

Peak Current Limit di/dt=90mA/µs

Shutdown Feedback Voltage

Shutdown Delay
Current

Leading-Edge Blanking Time

FSQ510H

FSQ510(M)

Thermal Shutdown Temperature

Synchronous Threshold Voltage

Synchronous Delay Time

Operating Supply Current
(Control Part Only)

(9)

V
V

V

(9)

VCC=11V, VFB=1V

V

V

Startup Charging Current VCC=VFB=0V,V

Supply Voltage VCC=VFB=0V, V

=40V, VCC=11V,

DS

Sweep

FB

=11V, VFB=5V

CC

=11V, VFB=1V

CC

=11V, VFB=5.5V

CC

STR

STR

=40V

Sweep

280 320 360 mA

4.2 4.7 5.2 V

4 5 6

3.5 4.5 5.5

360 ns

130 140 150

60

0.55 0.70 0.85 V

0.05 0.10 0.15 V

180 200 220 ns

0.8 1.0 mA

1.0 1.2 mA

27 V

μA

μA

μs

μs

μA

°C

°C

FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter