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PDF CR6850D Data sheet ( Hoja de datos )
| Número de pieza | CR6850D | |
| Descripción | Novel Low Cost Green-Power PWM Controller | |
| Fabricantes | Chip-Rail | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CR6850D (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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CR6850D
Novel Low Cost Green-Power PWM Controller
Features
Low Cost, PWM&PFM&CRM (Cycle
Reset Mode)
Low Start-up Current (about 8µA)
Low Operating Current (about 2mA)
Current Mode Operation
Under Voltage Lockout (UVLO)
Built-in Synchronized Slope
Compensation
Programmable PWM Frequency
Audio Noise Free Operation
Leading edge Blanking on Sense
input
Constant output power limiting for
universal AC input
Cycle-by-cycle current limiting
Soft clamped gate output voltage
16.8V
Over voltage protect 25.5V
High-Voltage CMOS Process with
ESD
SOT-23-6L、SOP-8 & DIP-8 Pb-Free
Packaging
Applications
Switching AC/DC Adaptor
Battery Charger
Open Frame Switching Power Supply
384X Replacement
General Description
The CR6850D is a highly integrated
low cost current mode PWM controller,
which is ideal for small power current
mode of offline AC-DC fly-back converter
applications. Making use of external
resistors, the IC changes the operating
frequency and automatically enters the
PFM/CRM (Cycle Reset Mode) under
light-load/zero-load conditions. This can
minimize standby power consumption and
achieve green-power functions. With a
very low start-up current, the CR6850D
could use a large value start-up resistor
(2Mohm). Built-in synchronized slope
compensation enhances the stability of the
system and avoids sub-harmonic
oscillation. Dynamic peak limiting circuit
minimizes output power change caused by
delay time of the system over a universal
AC input range. Leading edge blanking
circuit on current sense input could
remove the signal glitch due to snubber
circuit diode reverse recovery and thus
greatly reduces the external component
count and system cost in the design.
Pulse-by-pulse current limiting ensures
safe operation even during short-circuit.
The CR6850D offers more protection
like OVP (Over Voltage Protection) and
OCP (Over current protection). The
CR6850D’s output driver is soft clamped
to maximum 16.8V to protect the power
MOSFET. Excellent EMI performance is
achieved soft switching control at the
totem pole gate driver output. CR6850D is
offered in SOT-23-6, SOT-8 and DIP-8
packages.
启达科技（香港）有限公司
Aug, 2011 V3.0
www.chiprail.com
成都启臣微电子有限公司
1/13
Free Datasheet http://www.datasheet4u.com/
1 page  
CR6850D
TYPICAL CHARACTERISTICS
VDD startup Current VS Temperature
VDD (OFF) VS Temperature
VDD Operation Current VS Temperature
PWM frequency VS Temperature
VDD (ON) VS Temperature
Duty cycle VS Temperature
启达科技（香港）有限公司
Aug, 2011 V3.0
www.chiprail.com
成都启臣微电子有限公司
5/13
Free Datasheet http://www.datasheet4u.com/
5 Page 
CR6850D
SOT-23-6L
Symbol
A
A1
B
b
C
D
e
H
L
Dimensions In Millimeters
Min Max
0.700
1.000
0.000
0.100
1.397
1.803
0.300
0.559
2.591
3.000
2.692
3.099
0.838
1.041
0.080
0.254
0.300
0.610
Dimensions In Inches
Min Max
0.028
0.039
0.000
0.004
0.055
0.071
0.012
0.022
0.102
0.118
0.106
0.122
0.033
0.041
0.003
0.010
0.012
0.024
启达科技（香港）有限公司
Aug, 2011 V3.0
11/13
www.chiprail.com
成都启臣微电子有限公司
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet CR6850D.PDF ] | |
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