Document
Current Mode PWM Controller
Datasheet
SDC603
General Description
Features
SDC603 is a high-performance current mode control IC
Tdesigned for AC/DC convertor, which supplies about
continuous 12W output power at the universal AC input
CONFIDENTIAL DOCUMENrangefrom85Vto265V.
Built-in high voltage power transistor of 700V High voltage start-up 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 temperature
compensation 12W and peak 15W output power at the universal
AC input range 15W and peak 18W output power at AC input 220V Very few external components Package: DIP-8
Applications
Offline AC/DC flyback converter Adaptor/Charger for cell and other Portable
Apparatus Open Frame (for example, DVD, DVB)
SDC
DIP-8 Figure 1. Package Type
December, 2013 Rev. 1.2 ©2013 Shaoxing Devechip Microelectronics Co., Ltd.
1/11 www.sdc-semi.com
Current Mode PWM Controller
Datasheet
SDC603
Pin Configuration
DOCUMENTPin Number L1 IA2
3
T4 N5
6
CONFIDE7,8
OB 1
Package: DIP-8
8 OC
VCC 2
7 OC
GND 3
6 IS
CT 4
5 FB
Figure 2. Pin Configuration
Pin Name OB VCC GND CT FB IS OC
Function Startup current input, connecting to startup resistor
Supply voltage pin Ground
Oscillate capacitor pin 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
SDC
December, 2013 Rev. 1.2 ©2013 Shaoxing Devechip Microelectronics Co., Ltd.
2/11 www.sdc-semi.com
Current Mode PWM Controller
Datasheet
SDC603
Functional Block Diagram
NTVREF MEOLP
CT VCC
OB
STC
Dmax
OSC
CUFB IAL DOGND
1.4V
FB COMP
PWM
OVP 10V
UVP 3.7V
DRVU
OTP
CS COMP
0.625V
CONFIDENTFigure 3. Functional Block Diagram
OC OC
IS
SDC
December, 2013 Rev. 1.2 ©2013 Shaoxing Devechip Microelectronics Co., Ltd.
3/11 www.sdc-semi.com
Current Mode PWM Controller
Datasheet
SDC603
Ordering Information
Package DIP-8
TSDC603 X X - X ENCircuit Type
Package
MDIP-8: Z
E1: Pb-free G1: Halogen-free Blank: Tube
OCUTemperature CONFIDENTIAL D-40℃~85℃
Part Number
Pb-free
Halogen-free
SDC603Z -E1 SDC603Z -G1
Marking ID Pb-free Halogen-free
SDC603
SDC603G
Packing Type Tube
SDC
December, 2013 Rev. 1.2 ©2013 Shaoxing Devechip Microelectronics Co., Ltd.
4/11 www.sdc-semi.com
Current Mode PWM Controller
Datasheet
SDC603
Absolute Maximum Ratings (NOTE: Stresses greater than those listed under Absolute Maximum Ratings may cause
permanent damage to the device.) Parameter
TPower supply voltage VCC NEndurance voltage of OC collector EPeak value of switching current
Total dissipation power
MCollector current UOperating temperature
Storage temperature range
CLead temperature (soldering, 10sec) OLatch-up test per JEDEC 78
ESD, HBM model per Mil-Std-883, Method 3015
DESD,MM model per JEDEC EIA/JESD22-A115
Symbol
V CC V CB Ip PD IC TJ T STG T LEAD
HBM MM
Value
18 -0.3~700
1000 1000 1.8 -40~150 -55~150 260 200 2000 200
IALTable 2. Absolute Maximum Ratings
TRecommended Operating Conditions Parameter
NPower supply voltage, VCC EOscillating frequency IDOperating temperature
Symbol V CC f OSC Ta
Min 4.8 55 -40
Max 9.0 68 85
CONFTable 3. Recommended Operating Conditions
Unit V V mA
mW A °C °C °C mA V V
Unit V kHz °C
SDC
December, 2013 Rev. 1.2 ©2013 Shaoxing Devechip Microelectronics Co., Ltd.
5/11 www.sdc-semi.com
Current Mode PWM Controller
Datasheet
SDC603
Electrical Characteristics(Ta=25°C, VCC =7.0V, CT=680pF, RIS=1Ω, unless otherwise specified)
Parameter
TOn-state saturation voltage drop NOutput rise time EOutput fall time MHV start-up current CUOscillating frequency OTemperature Stability DTemperature Stability
Peak to peak value of oscillator
IALFall time of oscillator
Symbol
Conditions
Output Section
VSAT IOC=600mA Tr CL=1nF Tf CL=1nF ISTC Oscillator Section
f OSC △F V △F T
CT=680pF VCC =4.8V~9V Ta=0°C~85°C
VP-P -
Tf CT=680pF Feedback Section
TInput impedance IDENPSRR
Pull-up current IFB VFB=2.5V
Pull-down resistance
R FB
-
- VCC =4.8V~9V
Current Sampling Section
Over current threshold voltage
FIS-GND resistance NPSRR OOver current detection and control delay CMaximum duty cycle SDCMinimum duty cycle
V TH_OC I TH_OC
TD PWM Section
-
DMAX VFB=4.0V DMIN Power Current Section
Min Typ Max Unit
- - 1V - - 75 ns - - 75 ns 1 - 2.6 mA
55 61 68 kHz
- - 1%
- - 1%
- 2.5 -
V
- 800 -
ns
0.35 0.45 0.70 mA 10 15 20 kΩ - 60 70 dB
0.60 0.625 0.65 15 20 25 - 60 70 - 150 250
V Ω dB ns
52 57 62 - 1.5 -
% %
Startup leakage current
IST - - 15 50 uA
Static operation current
IOP VFB=0V,VCC=8V 2.0 2.8 4.0 mA
Startup threshold voltage
V ST
-
8.6 9.0 9.4
V
Minimal operating voltage
V UV
-
3.3 3.7 4.0
V
December, 2013 Rev. 1.2 ©2013 Shaoxing Devechip Microelectronics Co., Ltd.
6/11 www.sdc-semi.com
Current Mode PWM Controller
Datasheet
SD.