SDC608UTR-G1 [SDC]
Current Mode PWM Controller;型号: | SDC608UTR-G1 |
厂家: | Shaoxing Devechip Microelectronics Co., Ltd |
描述: | Current Mode PWM Controller |
文件: | 总11页 (文件大小:276K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Datasheet
General Description
Features
SDC608 is a high-performance current mode control IC
designed for AC/DC convertor, which supplies about
continuous 3.8W output power at the universal AC input
range from 85V to 265V.
Built-in oscillator
Built-in high voltage power transistor of 700V
Cycle-by-cycle current limit
Very low power consumption under no load
Internal slope compensation and feedback
compensation
Over load protection
Built-in high precise current limit with temperature
compensation
Over temperprotection
Low stand operating current
VCC overltage clamp
3.8W output power at the universal AC input range,
4.5W output power at AC input 220V
Package: SOP-7
Applications
Offline AC/DC flyback converter
Adaptor/Chargers for cell and other portable
apparatus
SOP-7
Figure 1. Package Type
December, 2013 Rev. 1.2
1/11
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
www.sdc-semi.com
Datasheet
Pin Configuration
Package: SOP-7
OB
OC
OC
1
8
7
NC
VCC
FB
2
3
GND
4
5
Figure 2. Pin Configuration
Pin Number
Pin Name
OB
ction
1
2
Start up current input, connecting to start-up resistor
NC
NC
3
VCC
FB
Supply voltage pin
4
Feedback pin
Ground
5
GND
OC
7,8
Output of HV transistor, connecting to primary wind of transformer
Table 1. Pin Configuration
December, 2013 Rev. 1.2
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
2/11
www.sdc-semi.com
Datasheet
Functional Block Diagram
VCC
OB
OC
OC
STC
VREF
Dmax
OSC
OLP
U
OVP
UVP
10V
3.5V
FB
COMP
FB
2.7V
OTP
CS
COMP
PWM
0.6V
GND
ure 3. Functional Block Diagram
December, 2013 Rev. 1.2
3/11
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
www.sdc-semi.com
Datasheet
Ordering Information
-
X
SDC608 X
X
E1: Pb-free
G1: Halogen-free
Circuit Type
Blank: Tube
TR: Tape Reel
Package
SOP-7: U
Part Number
Marking ID
Package
Temperature
Packing Type
Pb-free
Halogen-free
Pb-free
Halogen-free
SDC608U-E1
SDC608U1
SDC608
SDC608
SDC608G
SDC608G
Tube
SOP-7
-40℃~85℃
SDC608UTR-E1
SDC608UTR-G1
Tape Reel
December, 2013 Rev. 1.2
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
4/11
www.sdc-semi.com
Datasheet
Absolute Maximum Ratings (NOTE: Stresses greater than those listed under Absolute Maximum Ratings may cause
permanent damage to the device.)
Parameter
Power supply voltage VCC
Symbol
VCC
IC
Value
18
Unit
V
Collector current
1.5
A
Endurance voltage of OC collector
Peak value of switching current
Total dissipation power
VCB
Ip
-0.3~700
330
V
mA
mW
°C
PD
460
Operating Junction Temperature
Storage temperature range
TJ
-40~150
-55~150
10s
200
TSTG
TLEAD
-
°C
Lead temperature (soldering, 10sec)
Latch-up test per JEDEC 78
°C
mA
V
ESD, HBM model per Mil-Std-883, Method 3015
ESD, MM model per JEDEC EIA/JESD22-A115
HBM
MM
2000
200
V
Table 2. Absolute Maxium Ratings
Recommended Operating Conditions
Parameter
Power supply voltage, VCC
Operating temperature
Symbol
VCC
Min
Max
9.0
Unit
4.8
-40
V
85
°C
Ta
Tabecommended Operating Conditions
December, 2013 Rev. 1.2
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
5/11
www.sdc-semi.com
Datasheet
Electrical Characteristics (Ta=25°C, VCC =7.0V, unless otherwise specified)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Output Section
On-state saturation voltage drop
Output rise time
VSAT
IOC=290mA
CL=1nF
CL=1nF
-
-
-
-
-
-
-
1
V
ns
Tr
75
75
2.6
Output fall time
Tf
-
ns
HV start-up current
ISTC
1
mA
Oscillator Section
fOSC
Oscillation frequency
Temperature Stability
Temperature Stability
-
55
-
61
-
68
1
kHz
%
△FV
VCC =V
Ta=0°C~85°C
△FT
-
-
1
%
Feedback Section
IFB
RB
-
Pull-up current
Pull-down resistance
VFB=2.5V
0.40
10
-
0.55
15
0.70
20
mA
kΩ
dB
Input impedance
PSRR
-
VCC=4.8V~9V
60
70
Current Sampling Section
VTH_OC
Over current threshold voltage
Current limit
-
-
-
-
0.55
0.60
0.29
60
0.65
0.31
70
V
A
ITH_OC
0.27
-
PSRR
-
-
dB
ns
TD
Over current detection and control delay
150
250
PWM Section
DMAX
Maximum duty cycle
Minimum duty cycle
VFB=4.0V
-
52
-
57
62
-
%
%
DMIN
1.5
Power Current Section
IST
IOP
Startuleakage current
Static operation current
Startup threshold voltage
Minimal operating voltage
Restart voltage
-
-
15
2.8
9.0
3.5
2.0
10
50
4.0
9.4
3.8
2.4
10.6
uA
mA
V
2.0
8.6
3.2
1.7
9.6
VFB=0V,VCC=8V
VST
VUV
VRST
VOV
-
-
-
-
V
V
Over voltage protection
V
December, 2013 Rev. 1.2
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
6/11
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Datasheet
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
OTP Section
TOTP
BJT Section
ICBO
Thermal shutdown temperature
-
-
150
-
℃
Collector cutoff current
VCB=700V, IE=0
VCE=400V, IB=0
VEB=9V, IC=0
IC=0.1mA
-
-
-
-
-
-
-
-
-
0.1
0.1
0.1
-
mA
mA
mA
V
Collector-emitter cutoff current
Collector-base cutoff current
Collector-base breakdown voltage
Collector-emitter sustain voltage
Collector-base sustain voltage
DC current gain
ICEO
IEBO
700
VCBO
IC=1mA
400
9
VCEO
-
-
V
V
-
IE=
VEBO
VCE=5V, IC=0.5A
IC=1A, IB=0.25A
hFE
15
-
30
Collector-emitter saturation voltage
0.3
0.9
VCE_STA
VBE_STA
V
V
Base-emitter saturation voltage
IC=1A, IB=0.25A
0.9
1.2
Table 4. Electrical Characteristics
December, 2013 Rev. 1.2
7/11
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
www.sdc-semi.com
Datasheet
Function Description
Startup control
Current limit
During Startup phase, reference voltage, the oscillator
and all protection circuits are OFF. Startup current of
SDC608 is designed to be very low so that VCC could be
charged up above UVLO threshold level and device starts
up quickly. A large startup resistor can therefore be used
to minimize the power loss yet achieve a reliable startup
in application.
The output is shut off to limit the power when voltage of
IS Pin exceeds Current sense threshold voltage.
Green mode control
Under no-load and light-load condition, the switching
frequency internally decreases to lower the switching
power loss and improve the onversion efficiency. If FB is
less than 2.7V(Tycycle of the oscillator will increase
with it, the less FB the wider the cycle of the oscillator
is, until the ion stop.
PWM control
The peak current (sensed on the IS pin) is set by the
voltage on FB pin. By comparing the voltage on FB pin and
the IS ramp voltage, the duty-cycle of the PWM
modulator is thus adjusted to provide the necessary load
current at the desired output voltage. FB can be
controlled by internal control circuit and external
feedback circuit.
Power transistor drive
Dng the ON cycle, OB pin supplies base current for the
power transistor, OE pulls down the emitter of the power
transistor to IS, and OB is adaptive to the IS current. If the
current of IS exceeds the specified current of FB, SDC608
will turn into the OFF cycle. During the OFF cycle, OB is
pulled down, the power transistor will shut off.
VCC over voltage protection
VCC over voltage protection circuit is ined into IC.
When VCC voltage reaches 9.8V(TYP), FB voltage is pulled
down via internal control circuit, then the PWM switching
is shut off. When VCC voltage goes down below 9.8V(TYP),
the switching is reaed. The VCC over voltage
protection ensures IC to rate reliably.
Over temperature protection
When IC’s internal temperature reaches 150°C, FB
voltage will be pulled down by internal control circuit,
the switching frequency decreases or shut off. This
protection protects the IC from over temperature.
December, 2013 Rev. 1.2
8/11
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
www.sdc-semi.com
Datasheet
Typical Application
V+
GND
OC
OC
OB
NC
VCC
FB
GND
SDC608
Figure 4. Typical Application
December, 2013 Rev. 1.2
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
9/11
www.sdc-semi.com
Datasheet
Package Dimension
SOP-7
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
A2
b
1.350
0.100
1.350
0.330
0.170
4.700
1.750
0.250
1.550
0.510
0.250
5.100
0.053
0.004
0.053
0.013
0.007
0.185
0.069
0.010
0.061
0.020
0.010
0.201
c
D
e
1.270(BSC)
0.050(BSC)
E
5.800
3.800
0.400
0°
6.200
4.000
1.270
8°
0.228
0.150
0.016
0°
0.244
0.157
0.050
8°
E1
L
θ
December, 2013 Rev. 1.2
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
10/11
www.sdc-semi.com
Datasheet
Shaoxing Devechip MicroelectronCo., Ltd.
U
http://www.sdc-semi.com/
U
IMPORTANT NOTICE
Information in this document is provided solely in connection with Shaoxing Devechip Microelectronics Co., Ltd. (abbr. SDC) products.
SDC reserves the right to hanges, corrections, modifications or improvements, to this document, and the products and services
described herein at anytimthout notice. SDC does not assume any responsibility for use of any its products for any particular
purpose, nor does SDC asume any liability arising out of the application or use of any its products or circuits. SDC does not convey
any license under its patent rights or other rights nor the rights of others.
© 2013 Devechip Microelectronics - All rights reserved
Contact
Headquarters of Shaoxing
Address: Tian Mu Road, No13,
Shaoxing city, Zhejiang province, China
Zip code: 312000
Shenzhen Branch
Address: 22A, Shangbu building, Nan Yuan Road, No.68,
Futian District, Shenzhen city, Guangdong province, China
Zip code: 518031
Tel: (86) 0575-8861 6750
Tel: (86) 0755-8366 1155
Fax: (86) 0575-8862 2882
Fax: (86) 0755-8301 8528
December, 2013 Rev. 1.2
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
11/11
www.sdc-semi.com
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