|
|
PDF CR6853 Data sheet ( Hoja de datos )
| Número de pieza | CR6853 | |
| Descripción | Novel Low Cost Green-Power PWM Controller | |
| Fabricantes | Chip-Rail | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de CR6853 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
CR6853
Novel Low Cost Green-Power PWM Controller
With Low EMI Technique
Feature
Low Cost, PWM&PFM&CRM (Cycle
Reset Mode)
Low Start-up Current (about 1.5µA)
Low Operating Current (about 1.4mA)
Current Mode Operation
Under Voltage Lockout (UVLO)
Built-in Synchronized Slope
Compensation
Built-in Low EMI Technique
Programmable PWM Frequency
Audio Noise Free Operation
Leading edge Blanking on Sense input
Constant output power limiting for
universal AC input Range
SOT-23-6L 、SOP8 and DIP-8 Pb-Free
Applications
Switching AC/DC Adaptor
Battery Charger
Open Frame Switching Power Supply
Packaging
Compatible with SG6848 (6849) /
SG5701/SG5848/LD7535 (7550) /
OB2262 (2263)/OB2278（2279）
Complete Protection with
Soft Clamped GATE output voltage
18.0V
VDD over voltage protect 34.0V
Cycle-by-cycle current limiting
Sense Fault Protection
OTP (Over Temperature Protection)
Output SCP (Short circuit Protection)
Output OLP (Over Load Protection)
Latch mode After OLP&SCP
High-Voltage CMOS Process with ESD
Standby Power Supplies
Set-Top Box Power Supplies
384X Replacement
General Description
The CR6853 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 power-
saving functions. With a very low start-up
current, the CR6853 could use a large value
start-up resistor (2MΩ).
Built-in synchronized slope compensation
enhances the stability of the system and
avoids sub-harmonic oscillation. Dynamic
peak current 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. Cycle-by-Cycle current
limiting ensures safe operation even during
short-circuit.
Excellent EMI performance is achieved
built-in soft driver and low EMI technique.
The CR6853 offers perfect protection like
OVP(Over Voltage Protection)、OLP(Over
Load Protection) 、 SCP(Short circuit
protection)、OTP、Sense Fault Protection
and OCP(Over current protection). The
CR6853’s output driver is soft clamped to
maximum 18.0V to protect the power
MOSFET. CR6853 is offered in SOT-23-6L,
SOT-8 and DIP-8 packages.
Dec, 2007 V1.1
Chengdu Chip-Rail Tech. Co., Ltd.
1/11
http://www.chiprail.com
Free Datasheet http://www.Datasheet4U.com
1 page  
CR6853
Leading edge blanking time
TLEB
( LEB )
Oscillator (RI Pin)
FOSC
FPFM
DCMAX_W
DCMAX_F
ΔFTEMP
TBLANK
FJITTER
Normal Frequency
PFM Frequency
Maximum Duty Cycle PWM
Maximum Duty Cycle PFM
Frequency Temp. Stability
Leading-Edge Blanking Time
Frequency jitter
RI=100K
RI=100Kohm
RI=100Kohm
RI=100Kohm
RI=100Kohm
-30-100℃
RI=100Kohm
300 nS
60 65 70 KHz
22 KHZ
77 %
14 %
5%
300 nS
-4 4 %
GATE Drive Output (GATE Pin)
Output Low Level
VOL
Output High Level
VOH
TR1 Rising Time
TF1 Falling Time
TR2 Rising Time
TF2 Falling Time
TR3 Rising Time
TF3 Falling Time
TR4
TF4
VGCLAMP
Rising Time
Falling Time
Output Clamp Voltage
Low EMI technique
fEMI
∆f_osc
Low EMI frequency
Frequency modulation range
/Base frequency
VDD=16V,
IO=20mA
VDD=16V,
IO=20mA
CL=500pF
CL=500pF
CL=1000pF
CL=1000pF
CL=1500pF
CL=1500pF
CL=2000pF
CL=2000pF
VDD=20V
RI=100Kohm
RI=100Kohm
0.8 V
10
123
71
248
116
343
153
508
209
18.0
V
ns
ns
ns
ns
ns
ns
ns
ns
V
64 Hz
-3 3 %
Dec, 2007 V1.1
Chengdu Chip-Rail Tech. Co., Ltd.
5/11
http://www.chiprail.com
Free Datasheet http://www.Datasheet4U.com
5 Page 
CR6853
SOP-8L
Dimensions DISCLAIMERS
Symbol
A
A1
b
c
D
E
e
F
H
L
θ˚
Min.
1.346
0.101
4.648
3.810
1.016
5.791
0.406
0°
Millimeter
Typ.
0.406
0.203
1.270
0.381X45
°
Max.
1.752
0.254
4.978
3.987
1.524
6.197
1.270
8°
Min.
0.053
0.004
0.183
0.150
0.040
0.228
0.016
0°
Inch
Typ.
0.016
0.008
0.050
0.015X45
°
Max.
0.069
0.010
0.196
0.157
0.060
0.244
0.050
8°
Dec, 2007 V1.1
Chengdu Chip-Rail Tech. Co., Ltd.
11/11
http://www.chiprail.com
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CR6853.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| CR6850 | Novel Low Cost Green-Power PWM Controller | Chip-Rail |
| CR6850C | Novel Low Cost Green-Power PWM Controller | Chip-Rail |
| CR6850D | Novel Low Cost Green-Power PWM Controller | Chip-Rail |
| CR6851 | Novel Low Cost Green-Power PWM Controller | Chip-Rail |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |