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PDF SDC7500 Data sheet ( Hoja de datos )
| Número de pieza | SDC7500 | |
| Descripción | Voltage Mode PWM Controller | |
| Fabricantes | SDC | |
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 1. Mode PWM Controller - SDC  Hay una vista previa y un enlace de descarga de SDC7500 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Voltage Mode PWM Controller
Datasheet
SDC7500
General Description
Features
The SDC7500 is a voltage mode pulse width modulation
Tswitching regulator control circuit designed primarily for
power supply control.
NThe SDC7500 consists of a reference voltage circuit, two
Eerror amplifiers, an on-chip adjustable oscillator, a
Mdead-time control (DTC) comparator, a pulse-steering
control flip-flop, and an output control circuit. The
Uprecision of voltage reference (VREF) is ±1% through
Ctrimming and this provides a better output voltage
regulation. The SDC7500 provides for push-pull or
Osingle-ended output operation, which can be selected
Dthrough the output control.
Complete PWM power control circuitry
Uncommitted outputs for 200mA sink or source
current
Output control for single ended or push pull
operation
Internal regulator provides a stable 5V reference
supply with 5% tolerance
Adjustable dead-time control
Package: DIP-16
Applications
PC power supply
DC-DC convertor
CONFIDENTIALPin Configuration
1 VIN+
2 VIN-
3 COMP
4 DEAD
5 CT
VIN+ 16
VIN- 15
VREF 14
CTRL 13
VCC 12
SDC
DIP-16
6 RT
7 GND
8 C1
C2 11
E2 10
E1 9
Figure 1. Pin Configuration
January, 2013 Rev. 1.0
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
1/8
www.sdc-semi.com
Free Datasheet http://www.nDatasheet.com
1 page  
Voltage Mode PWM Controller
Datasheet
SDC7500
Electrical Characteristics (Ta=25°C,VCC=15.0V, unless otherwise specified.)(Continued)
Parameter
Symbol
Conditions
Min Typ Max Unit
Output Section
NTCollector off-state current
IC
VCE=40V
VCC=40V
2 100 uA
EEmitter off-state current
IE
VCC=VC=40V
VE=0
-100 uA
MCollector-emitter
saturation voltage
Common-emitter
Emitter-follower
VSAT VE=0, IC=100mA
VSAT VC=15V, IE=-100mA
1.0 1.3
1.5 2.5
V
V
CUOutput control input current
IIN VI=VREF
Switching Characteristics
3.5 mA
Output voltage rise time
OOutput voltage fall time
tr Common-emitter
tf configuration
100 200
25 100
ns
ns
DOutput voltage rise time
Output voltage fall time
tr Emitter-follower
tf configuration
100 200
40 100
ns
ns
IALTable 4. Electrical Characteristics
TTypical Performance Characteristics
NCommon-Emitter Configuration
E105
IDCT=0.001uF
104
FCT=0.01uF
103
NCT=0.1uF
O102
CVCC=15V
Ta=0°C~70°C
101
CT=1uF
C103 104
105
RT(timing resistance)(Ω)
106
SDFigure 3. Oscillator frequency and frequency
Emitter-Follower Configuration
100
80
60
40
VCC=15V
20
∆V=3V
Ta=25°C
0
102
103 104 105 106
Frequency(Hz)
Figure 4. Amplifier voltage amplification
variation vs. Timing resistance
January, 2013 Rev. 1.0
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
5/8
www.sdc-semi.com
Free Datasheet http://www.nDatasheet.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SDC7500.PDF ] | |
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