Fairchild FSD210, FSD200 Operator's Manual

©2004 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev.1.0.3

Features

• Single Chip 700V Sense FET Power Switch

• Precision Fixed Operating Frequency (134kHz)

• Advanced Burst-Mode operation Consumes under 0.1W
at 265Vac and no load (FSD210 only)

• Internal Start-up Switch and Soft Start

• Under Voltage Lock Out (UVLO) with Hysteresis

• Pulse by Pulse Current Limit

• Over Load Protection (OLP)

• Internal Thermal Shutdown Function (TSD)

• Auto-Restart Mode

• Frequency Modulation for EMI

• FSD200 does not require an auxiliary bias winding

Applications

• Charger & Adaptor for Mobile Phone, PDA & MP3

• Auxiliary Power for White Goods, PC, C-TV & Monitor

Description

The FSD200 and FSD210 are integrated Pulse Width Modu­lators (PWM) and Sense FETs specially designed for high
performance off-l ine Switch Mode Power Supplies (SMP S)
with minimal external components. Both devices are mono­lithic high voltage power switching regulators which com­bine an LDMOS Sense FET with a voltage mode PWM
control block. The integrated PWM controller features in­clude: a fixed oscillator with frequency modulatio n for re­duced EMI, Under Voltage Lock Out (UVLO) protection,
Leading Edge Blanking (LEB), optimized gate turn-on/turn ­off driver, thermal shut down protection (TSD), temperature
compensated precision current sources for loop compe nsa­tion and fault protection circuitry. When compared to a dis­crete MOSFET and controller or RCC switching converter
solution, the FSD200 and FSD210 reduce total component
count, design size, weight and at the same time increase effi­ciency, productivity, and system reliability. The FSD200
eliminates the need for an auxiliary bi as winding at a small
cost of increased supply power. Both devices are a basic plat­form well suited for cost effective designs of flyback convert­ers.

Table 1. Notes: 1. Typical continuous power in a non-ven­tilated enclosed adapt er me as ured at 50°C ambient. 2.
Maximum practical continuous power in an open frame
design at 50°C ambient. 3. 230 VAC or 100/115 VAC with
doubler.

Typical Circuit

Figure 1. Typical Flyback Application using FSD210

Figure 2. Typical Flyback Application using FSD200

OUTPUT POWER TABLE

PRODUCT

230VAC ±15%

(3)

85-265VAC

Adapter

(1)

Open

Frame

(2)

Adapter

(1)

Open

Frame

(2)

FSD210 5W 7W 4W 5W

FSD200 5W 7W 4W 5W
FSD210M5W7W4W5W
FSD200M5W7W4W5W

Drain

Source

Vstr

Vfb Vcc

PWM

AC

IN

DC

OUT

Drain

Source

Vstr

Vfb Vcc

PWM

AC

IN

DC

OUT

FSD210, FSD200

Green Mode Fairchild Power Switch (FPS

TM

)

FSD210, FSD200

2

Internal Block Diagram

Figure 3. Functional Block Diagram of FSD210

Figure 4. Functional Block Diagram of FSD200 show in g internal high voltage regulato r

8

5

UVLO

Voltage

Ref

H

Vstr

Vcc

Internal

Bias

L

Rsense

Iover

S/S

3mS

4

1, 2, 3

7

OSC

SRQ

TSD

SRQ

LEB

OLP

Reset

A/R

DRIVER

Frequency
Modulation

5uA

250uA

Vck

Vth

SFET

Drain

GND

Vfb

BURST

V

SD

V

BURST

8.7/6.7V

Rsense

Iover

S/S

3mS

4

1, 2, 3

7

OSC

SRQ

TSD

SRQ

LEB

OLP

Reset

A/R

DRIVER

Frequency
Modulation

5uA

250uA

Vck

Vth

SFET

Drain

GND

Vfb

BURST

V

SD

V

BURST

7V

8

5

UVLO

Voltage

Ref.

HV/REG

INTERNAL

BIAS

ON/OFF

Vstr

Vcc

FSD210, FSD200

3

Pin Definitions

Pin Configuration

Figure 5. Pin Configuration (Top View)

Pin Number Pin Name Pin Function Description

1, 2, 3 GND Sense FET source terminal on primary side and internal control ground.

4Vfb

The feedback voltage pin is the inverting input to the PWM comparator with
nominal input levels between 0.5Vand 2.5V. It has a 0.25mA current source
connected internally while a capacitor and opto coupler are typically
connected externally. A feedback voltage of 4V triggers overload protection
(OLP). There is a time delay while charging between 3V and 4V using an
internal 5uA current source, which prevents false triggering under transient
conditions but still allows the protection mechanism to operate under true
overload conditions.

5Vcc

FSD210

Positive supply voltage input. Although connected to an auxiliary
transformer winding, current is supplied from pin 8 (Vstr) via an internal
switch during startup (see Internal Block Diagram section). It is not until Vcc
reaches the UVLO upper threshold (8.7V) that the internal start-up switch
opens and device power is supplied via the auxiliary transformer winding.

FSD200

This pin is connected to a storage capacitor. A high voltage regulator
connected between pin 8 (Vstr) and this pin, provides the supply voltage to
the FSD200 at startup and when switching during normal operation. The
FSD200 eliminates the need for auxiliary bias winding and associated
external components.

7Drain

The Drain pin is designed to connect directly to the primary lead of the
transformer and is capable of switching a maximum of 700V. Minimizing the
length of the trace connecting this pin to the transformer will decrease
leakage inductance.

8Vstr

The startup pin connects directly to the rectified AC line voltage source for
both the FSD200 and FSD210. For the FSD210, at start up the internal
switch supplies internal bias and charges an external storage capacitor
placed between the Vcc pin and ground. Once this reaches 8.7V, the
internal current source is disabled. For the FSD200, an internal high voltage
regulator provides a constant supply voltage.

1
2

3
45

7

8

GND
GND
GND

Vfb

Vstr

Drain

Vcc

7-DIP
7-LSOP

FSD210, FSD200

4

Absolute Maximum Ratings

(Ta=25°C unless otherwise specified)

Thermal Impedance

Note:

1. Free standing without heat sink.

2. Measured on the GND pin close to plastic interface.

3. Soldered to 100mm

2

copper clad.

4. Soldered to 300mm

2

copper clad.

Parameter Symbol Value Unit

Maximum Supply Voltage (FSD200) V

CC,MAX

10 V

Maximum Supply Voltage (FSD210) V

CC,MAX

20 V

Input Voltage Range V

FB

−0.3 to V

STOP

V

Operating Junction Temperature. T

J

+150 °C

Operating Ambient Temperature T

A

−25 to +85 °C

Storage Temperature Range T

STG

−55 to +150 °C

Parameter Symbol Value Unit
7DIP

Junction-to-Ambient Thermal

θ

JA

(1)

74.07

(3)

°C/W

θ

JA

(1)

60.44

(4)

°C/W

Junction-to-Case Thermal

θ

JC

(2)

22.00 °C/W

7LSOP

Junction-to-Ambient Thermal

θ

JA

(1)

- °C/W

θ

JA

(1)

- °C/W

Junction-to-Case Thermal

θ

JC

(2)

- °C/W

FSD210, FSD200

5

Electrical Characteristics

(Ta=25°C unless otherwise specified)

Note:

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

2. This para meter is derived from characterization

Parameter Symbol Condition Min. Typ. Max. Unit
Sense FET SECTION

Drain-Source Breakdown Voltage BV

DSS

V

CC

= 0V, ID = 100µA 700 - - V

Startup Voltage (Vstr) Breakdown BV

STR

700 - - V

Off-State Current I

DSS

V

DS

= 560V - - 100 µA

On-State Resistance R

DS(ON)

Tj = 25°C, ID = 25mA - 28 32 Ω
Tj = 100°C, I

D

= 25mA - 42 48 Ω

Rise Time T

R

V

DS

= 325V, ID = 50mA - 100 - ns

Fall Time T

F

V

DS

= 325V, lD = 25mA - 50 - ns

CONTROL SECTION

Output Frequency F

OSC

Tj = 25°C 126 134 142 kHz

Output Frequency Modulation F

MOD

Tj = 25°C-±4-kHz

Feedback Source Current I

FB

Vfb = 0V 0.22 0.25 0.28 mA

Maximum Duty Cycle D

MAX

Vfb = 3.5V 60 65 70 %

Minimum Duty Cycle D

MIN

Vfb = 0V 0 0 0 %

UVLO Threshold Voltage (FSD200)

V

START

6.377.7V

V

STOP

After turn on 5.3 6 6.7 V

UVLO Threshold Voltage (FSD210)

V

START

8.0 8.7 9.4 V

V

STOP

After turn on 6.0 6.7 7.4 V

Supply Shunt Regulator (FSD200) V

CCREG

--7-V

Internal Soft Start Time T

S/S

-3-ms

BURST MODE SECTION

Burst Mode Voltage

V

BURH

Tj = 25°C

0.58 0.64 0.7 V

V

BURL

0.5 0.58 0.64 V

Hysteresis - 60 - mV

PROTECTION SECTION

Drain to Source Peak Current Limit I

OVER

0.275 0.320 0.365 A

Current Limit Delay

(1)

T

CLD

Tj = 25°C - 220 - ns

Thermal Shutdown Temperature (Tj)

(1)

T

SD

125 145 160 °C

Shutdown Feedback Voltage V

SD

- 3.5 4.0 4.5 V

Feedback Shutdown Delay Current I

DELAY

Vfb = 4.0V 3 5 7 µA

Leading Edge Blanking Time

(2)

T

LEB

200 - - ns

TOTAL DEVICE SECTION

Operating Supply Current (FSD200) I

OP

Vcc = 7V - 600 - µA

Operating Supply Current (FSD210) I

OP

Vcc = 11V - 700 - µA

Start Up Current (FSD200) I

START

Vcc = 0V - 1 1.2 mA

Start Up Current (FSD210) I

START

Vcc = 0V - 700 900 µA

Vstr Supply Voltage Vcc = 0V 20 - - V

FSD210, FSD200

6

Comparison Between FSDH565 and FSD210

Function FSDH0565 FSD210 FSD210 Advantages

Soft-Start not applicable 3mS • Gradually increasing current limit

during soft-start further reduces peak
current and voltage component
stresses

• Eliminates external components used
for soft-start in most applications

• Reduces or eliminates output
overshoot

Switching Frequency 100kHz 134kHz • Smaller transformer
Frequency Modulation not applicable ±4kHz • Reduced conducted EMI
Burst Mode Operation not applicable Yes-built into

controller

• Improve light load efficiency

• Reduces no-load consumption

• Transformer audible noise reduction

Drain Creepage at
Package

1.02mm 3.56mm DIP

3.56mm LSOP

• Greater immunity to acting as a result
of build-up of dust, debris and other
contaminants