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PDF CR6203 Data sheet ( Hoja de datos )
| Número de pieza | CR6203 | |
| Descripción | Switching Power Supply Controller ICs | |
| Fabricantes | Power Rail | |
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Hay una vista previa y un enlace de descarga de CR6203 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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CR6203
Switching Power Supply Controller ICs
Features
Set-in high-voltage power switch transistor of 700V and few peripheral components
With the modulation of lock pulse width, the testing is according to the pulse limit current.
With the function of output frequency reduction, the non-output power consumption can be less than
0.3W.
Inner-built ramp and anti-feedback compensation function
The independent upper-limit current testing controller deals with over-current and over-load of the
controller real-timely.
The period emission pole is turned off and it outputs by deflected voltage, and the pressure resistance of
the power transistor is improved.
Set-in current limit resistance with temperature compensation, which makes the current limit precise
Set-in heat protection circuit
Startup is accomplished with the magnification function of the switch power transistor, and the power
consumption of startup resistance is reduced more than10 times.
Few peripheral components
Low startup and operating current
VCC over-voltage automatic limit
Continuous Wide-voltage output power up to 5W, and the narrow-voltage output power up to 8W.
Pb-Free DIP-8L Package
General Description
PWM controller of high-performance current mode is specially designed for AC/DC transformer with
high performance and price ratio, which supplies continuous output power of 12W within the range of
wide-voltage between 85V and 265V, the output power of peak value can be up to 18W. The combination of
optimized reasonable circuit design and bipolar facture technology with high performance and price ratio
economizes the whole cost ultimately. The power controller can be applied to the typical flyback circuit
topology so as to form a simple AC/DC transformer. The startup circuit inside IC is designed as a particular
current inhalation way, so it can start up with the magnification function of the power switch transistor itself,
which lessens the power consumption for starting the resistance remarkably; when the output power is lower,
IC will reduce the working frequency automatically, therefore, the standby power consumption becomes
extremely low. When the power transistor is closed, the interior circuit will bias it reversely, utilize the
Aug.2008 V2.0
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1 page  
DataSheet.in
CR6203
temperature
Vibration amplitude of oscillator
(Vp-p)
Drop edge of oscillator
Ct=680PF
- 2.4 -
- 900 -
V
ns
Feedback
Item
Pull-up current
pull-down resistance
Power supply rejection ratio
Testing condition Min. Typ. Max. Unit
Ct=680PF
Vcc=5.5-9V
Vcc=5.5-9V
- 0.50 0.60 mA
- 30 - KΩ
- 60 70 dB
Current sampling
Item
Current sampling limit
upper limit current prevention
Power supply rejection ratio
transmission delay
Testing condition Min. Typ. Max. Unit
0.54 0.58 0.63
0.54 0.58 0.63
- 60 70
- 150 250
V
A
dB
ns
Pulse Width Modulation
Item
Maximum duty cycle
Minimum duty cycle
Testing condition Min. Typ. Max. Unit
55 60 75 %
- - 3.5 %
Power Supply current
Item
Startup acceptance current
Startup static current
Static current
Startup voltage
Close voltage ofoscillator
Restart voltage
Over-voltage limit margin
Testing condition Min. Typ. Max. Unit
Vcc=8V
1.6 2.0 2.4 mA
- 50 80 μA
- 3.0 - mA
8.5 9.0 9.8
V
4.2 4.4 4.6
V
- 3.6 -
V
10.0 10.5 12.0
V
Operation description
During start-up phase, VR is closed when electrified; FB pull-up power source is closed, the start-up
current is input from power transistor to VCC through OE; OB controls the base current of power
transistor and limits the current of power transistor collector (namely, CR6203 starts the acceptance
current), accordingly, the security of the power transistor is ensured; when VCC voltage goes up to 8.8V,
the start-up phase is ended, and it comes into the normal phase.
During normal phase, VCC voltage shall keep at 4.8~9.0V, VR outputs 2.5V benchmark; FB pull-up
Aug.2008 V2.0
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5 Page 
DataSheet.in
CR6203
CR6203_12V1A FLYBACK POWER
6&+(0$7,&
3 AC
+1
4 AC
-2
B1
T1
C1
F1
AC2 AC1
R1 R3
C2
R2 D2
C3
D1
R4
1
2
3
4
OB
VCC
GND
CT
OC
OC
IS
FB
C5 U1
8 C4
7
6
5FB
R5
1 10
2 D3
3 9 D4
57
C9 R6
46
T2
FB 4
CY1 RFB1 3
C10
12
L1
DC+
C6 C7
C8 R9
GND
U2 1
2 R7
R8
U3
C11 DC+
R10 R11
1
R12
3&%/D\RXW
Aug.2008 V2.0
PCB Layout
11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CR6203.PDF ] | |
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