Datasheet
Current Mode PWM Controller

SDC606

General DescriptionFeatures

SDC606 is a high-performance current mode control ICBuilt-in oscillator

T

designed for AC/DC convertor, which supplies about

Built-in high voltage power transistor of 700V

continuous 12W output power at the universal AC input

High voltage start-up

range from 85V to 265V.

Very low start-up and operating current

Low standby power consumption

Protections: OVP, UVLO, SCP, OLP and OTPBuilt-in high precise current limit with temperatureNEM

Ucompensation

C12W and peak 15W output power at the universal

OAC input range
15W and peak 18W output power at AC input 220V



Very few external componentsLADPackage: DIP-8ApplicationsIT

NEDI
FPortable rechargeable power supplyAppliance controller power supply

Adaptor/charger for cell and other portableapparatus



DVD/DVB power supply, ATX standby power supply

NOCDSC

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DatasheetCurrent Mode PWM Controller

SDC606

Pin Configuration

TN
E

Package: DIP-8OB

18OCVCC

27OCGND

36ISNC

45FBFigure 2. Pin Configuration

LAM

UCO

DPin NumberPin Name

1OB

Startup current input, connecting to startup resistor

2VCC

Supply voltage pin

3GND

4NC

5FB

6IS

7,8OCI
T

N
E

FID

Function

GroundNC
Feedback pin

Cycle-by-cycle current limit, connecting a resistor to GND

Output of HV transistor, connecting to primary wind of transformer

Table 1. Pin Description

NOCCDS

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Datasheet
Current Mode PWM Controller

SDC606Functional Block Diagram
VCC

VREF

OCN
E
OC

Dmax
OSC

OLP

M

OVP

FB

T

OB
STC

2.4V

DRVU

UVP
12V

FB
COMP

O

OTP

DCS
COMP
PWM

0.625V

L
A

GND

UC

3.7V

IS

IT

Figure 3. Functional Block Diagram

NE

DI
F

NO

C

C

DS

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Datasheet
Current Mode PWM Controller

SDC606

Ordering Information

TNE

SDC606 X X - X
E1: Pb-free
G1: Halogen-free

Circuit Type
Package
DIP-8: Z

Package

Temperature

DIP-8-40℃~85℃

Blank: Tube

Part Number
Halogen-freePb-free

SDC606Z-E1

SDC606Z-G1

SDC606

Packing TypeSDC606G

Tube

LA

Halogen-freeO

DUCMarking ID

Pb-free

M

IT

NE

DI
F

NOCC

DS

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Datasheet
Current Mode PWM Controller

SDC606

Absolute Maximum Ratings (NOTE: Stresses greater than those listed under Absolute Maximum Ratings may cause
permanent damage to the device.)

ParameterSymbolValue

Power supply voltage VCCV CC18

Endurance voltage of OC collector

V CB-0.3~700

Peak value of switching current

Ip

1000

Total dissipation power

PD

1000

Collector current

IC

1.8

Operating Junction Temperature

TJ-40~150

Storage temperature range

T STG-55~150

Lead temperature (soldering, 10sec)

T LEAD

Latch-up test per JEDEC 78

HBMESD,MM model per JEDEC EIA/JESD22-A115

MMLA

DITTNEVVM

UmAmW
A°C

C260°C

200mA

2000

V200V

O-ESD, HBM model per Mil-Std-883, Method 3015

Unit°C

Table 2. Absolute Maximum Ratings

Recommended Operating Conditions

NEParameter
Power supply voltage, VCC
Operating temperature

DI
F

SymbolMin

MaxUnit

V CC

4.5

11.0

VTa

-40

85°C

Table 3. Recommended Operating Conditions

NO

CCDS

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Datasheet
Current Mode PWM Controller

SDC606

Electrical Characteristics(Ta=25°C, V CC =7.0V, R I S =1Ω, unless otherwise specified)Parameter

SymbolConditions

MinTypMax

Output Section

UnitTNE

On-state saturation voltage drop

V SAT

I OC =600mA--

1V

Output rise timeTr

C L =1nF

-

-

75

ns

Output fall timeTf

C L =1nF

-

-

75

ns

HV start-up current

I STC

-

1-

2.6mA

U70

kHz

-

1%-

1%

0.40

0.50

0.70mA

101520kΩ-

6070dB-

0.60

0.625

0.65

V-

152025

Ω--

6070dB--

150250ns

D MAX

V FB =4.0V525762%

D MIN--1.5-%Oscillator Section
Oscillating frequency

f OSC-55

Temperature Stability△F V

V CC =4.5V~11V-

Temperature Stability△F T

Ta=0°C~85°C

OFeedback Section
Pull-up current

I FB

V FB =2.5V

Pull-down resistanceR FB

PSRR-LA-

D

V CC =4.5V~11V

I
T-

C

61

M

Current Sampling Section
Over current threshold voltage

V TH_OC

IS-GND resistance

I TH_OC

N
E

PSRR

PSRR

Over current detection and control delayTDID

Maximum duty cycle

F

Minimum duty cycle

NStart-up current

OOperating current

PWM Section

Power Current Section
I ST--1550uAI OP

V FB =0V , V CC =8V

2.0

2.8

4.0mAV ST-

8.8

9.2

9.6

VC

V UV-

3.3

3.7

4.0

V

V RST-

1.7

2.0

2.4

V

Over voltage protection

V OV-

111213V--150-℃

Start-up Voltage

Under-voltage lockout threshold

CRestart Voltage

DS

T OTP

Collector cutoff current

I CBO

V CB =700V, I E =0--0.1

mA

Collector-emitter cutoff current

I CEO

V CE =450V, I B =0--0.1mA

Collector-base cutoff current

I EBO

V EB =9V, I C =0--0.1mA

Collector-base breakdown voltage

V CBO

I C =0.1mA

700--V

Collector-emitter sustain voltage

V CEO

I C =1mA

450--

V

Thermal shutdown temperature

OTP Section
BJT Section

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Datasheet
Current Mode PWM Controller

SDC606

Parameter

SymbolConditions

MinTypMax

Unit

Collector-base sustain voltage

V EBO

I E =0.1mA

9--V

DC current gainh FE

V CE =5V, I C =0.5A

15-50-Collector-emitter saturation voltage

V CE_STAI C =1A, I B =0.25A

0.3

0.8

V

Base-emitter saturation voltage

V BE_STAI C =1A, I B =0.25A

0.8

1.2

VT

NE

Table 4. Electrical Characteristics

MUCO

L
A

DIT

N
E

DI
FNO

CC

DS

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Datasheet
Current Mode PWM Controller

SDC606Function Description

TStartup control

frequency internally decreases to lower the switching

Startup current of SDC606 is designed to be very low soNEpower loss and improve the conversion efficiency. If FB isless than 2.4V(Typ), the cycle of the oscillator will increasethat VCC could be charged up above UVLO threshold levelwith it, the less FB is, the wider the cycle of the oscillator

and device starts up quickly. A large startup resistor canis, until the oscillation stop.

therefore be used to minimize the power loss yet achieveMU

a reliable startup in application.

Power transistor drive

PWM control

During the ON cycle, OB pin supplies base current for theCOThe peak current (sensed on the IS pin) is set by thepower transistor, OE pulls down the emitter of the powertransistor to IS, and OB is adaptive to the IS current. If thevoltage on FB pin. By comparing the voltage on FB pin andcurrent at the desired output voltage. FB can be
feedback circuit.

NEDIF

When VCC voltage reaches 12V(TYP), FB voltage is pulled
down via internal control circuit, then the PWM switchingis shut off. When VCC voltage goes down below 12V(TYP),N

the switching is reactivated. The VCC over voltage
protection ensures IC to operate reliably.

Current limit

OCThe output is shut off to limit the power when voltage ofC

IS Pin exceeds Current sense threshold voltage.

DS

Green mode control

pulled down, the power transistor will shut off.

IT

controlled by internal control circuit and external

VCC over voltage protection circuit is integrated into IC.

LAwill turn into the OFF cycle. During the OFF cycle, OB ismodulator is thus adjusted to provide the necessary load

VCC over voltage protectionD

current of IS exceeds the specified current of FB, SDC606

the IS ramp voltage, the duty-cycle of the PWM

Over temperature protection
When IC’s internal temperature reaches 150°C, FB voltage
will be pulled down by internal control circuit, theswitching frequency decreases or shut off. This protection
protects the IC from over temperature.

Cooling requirements
Layout is important for all switching regulators. To achieve
high efficiency, good regulation, and stability, a welldesigned printed circuit board layout is required. The mainpower loss inside IC is produced by the internal transistor,
an extra copper plane at the pin7 and pin8 help dissipate
the heat generated by losses in transistor. For a typicalapplication (AC input from 85V to 265V, 12W output), and200mm2 copper plane is necessary.

Under no-load and light-load condition, the switching

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Datasheet
Current Mode PWM Controller

SDC606

Typical Application

OBOCVCCOCGNDISNCFBMGNDUCO

SDC606

L
A

N

L

T

N
E
V+DI
T

N
E

Figure 4. Typical Application

DI
F

NO

CC

DS

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Datasheet
Current Mode PWM Controller

SDC606

Package Dimension
DIP-8

T

N
E

M

UC

O

LA

DI
TN
E

DI
F

N

Dimensions In Millimeters

Symbol
A
A1
A2

CB
B1

DS
C

C

O

Dimensions In Inches

Min

MaxMin

Max

3.710

4.310

0.146

0.170

0.510

0.020

3.200

3.600

0.126

0.142

0.380

0.5700.015

0.022

1.524(BSC)

0.060(BSC)

0.204

0.360

0.008

0.014

D

9.000

9.400

0.354

0.370

E

6.200

6.600

0.244

0.260

E1

7.320

7.920

0.288

0.312

e2.540(BSC)

0.100(BSC)

L

3.000

3.600

0.118

0.142

E2

8.400

9.000

0.331

0.354

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Datasheet
Current Mode PWM Controller

SDC606TNEMUCO

Shaoxing Devechip Microelectronics Co., Ltd.
http://www.sdc-semi.com/LA

UUUU

UUUU

DITNEDIFIMPORTANT NOTICEInformation in this document is provided solely in connection with Shaoxing Devechip Microelectronics Co., Ltd. (abbr. SDC) products.

NSDC reserves the right to make changes, corrections, modifications or improvements, to this document, and the products and services
described herein at anytime, without notice. SDC does not assume any responsibility for use of any its products for any particularO

purpose, nor does SDC assume any liability arising out of the application or use of any its products or circuits. SDC does not convey

Cany license under its patent rights or other rights nor the rights of others.

Contact us:CDS© 2013 Devechip Microelectronics - All rights reserved

Headquarters of Shaoxing

Shenzhen Branch

Address: Tian Mu Road, No13,

Address: 22A, Shangbu building, Nan Yuan Road, No.68,

Shaoxing city, Zhejiang province, China

Futian District, Shenzhen city, Guangdong province, China

Zip code: 312000

Zip code: 518031

Tel: (86) 0575-8861 6750

Tel: (86) 0755-8366 1155

Fax: (86) 0575-8862 2882

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