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PDF C2162PX2 Data sheet ( Hoja de datos )
| Número de pieza | C2162PX2 | |
| Descripción | Primary Sensing SMPS Controller | |
| Fabricantes | Cambridge Semiconductor | |
| Logotipo |  |
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C2161PX2 and C2162PX2 Datasheet
Primary Sensing SMPS Controller For Offline Applications
ADVANTAGES
Low cost bipolar primary switch
Tight tolerance CV/CC operation
Low component count
High efficiency (Energy Star 2.0 compliance with margin)
< 30 mW no-load power consumption (Five star rating)
Programmable maximum switching frequency
Programmable output cable compensation up to 10%
C2161PX2
C2162PX2
SOT23-6
FEATURES
Advanced primary sensing controller achieves true CV/CC output characteristic without opto-coupler
Full featured protection for over-temperature, input over-voltage, input under-voltage, output short-circuit
Advanced PFM/PWM control and quasi-resonant switching for increased efficiency
Switching timing jitter spreads RF spectral emissions, eases EMC compliance
SOT23-6 package
APPLICATIONS
Universal input mobile phone and USB chargers.
Universal standby and auxiliary power supplies up to 8 W using C2162PX2 (up to 4 W using C2161PX2).
Figure 1: Typical Application Circuit
Preliminary
© Cambridge Semiconductor Ltd 2009
Page 1
DS-2918-0906
12-Jun-2009
1 page  
C2161PX2 and C2162PX2 Datasheet
Primary Sensing SMPS Controller For Offline Applications
Constant Voltage and Constant Current (CV/CC) Operation
The C2161PX2 and C2162PX2 controllers achieve constant voltage and constant current output within tight
limits without the need for any secondary sensing components, by sensing the primary side waveforms of
transformer voltage and primary switch current. Figure 6 shows the output characteristics of a typical phone
charger implemented with the C2161PX2 and C2162PX2.
VOUT
(ICCMIN,VNOM)
100%
50%
30%
IOUT
0
50%
100%
Figure 6: Achievable Charger Output Characteristic Using C2161PX2 and C2162PX2
Preliminary
© Cambridge Semiconductor Ltd 2009
Page 5
DS-2918-0906
12-Jun-2009
5 Page 
C2161PX2 and C2162PX2 Datasheet
Primary Sensing SMPS Controller For Offline Applications
CS Pin
Parameter
CS input minimum threshold
CS input maximum threshold
CS turn-off response time
CS Input Offset Error
CS Input Leakage Current
CS input limit for CC
operation (average)
Leading edge blanking time
Symbol
VCSMIN
VCSMAX
tCSOFF
VCSOFF
ICSLEAK
VCSCC
tCSB1
Condition
Outside CS
blanking time
tCSB1
Minimum load
Over-current
protection
Step VCS 0V to
(VCSMAX - 50 mV)
-0.2 V < VCS < VDD
F = 40 kHz, t1 = t2 = 12.5 s,
T=25°C
See Figure 7
ED Pin
Parameter
On-state resistance
Off-state current
Minimum on-time
Symbol
REDON
IEDOFF
tONMIN
Condition
IED < IED(MAX)
VED = VDD
Min
-10
-32.5
Min
Typ
-38
-182
250
350
-31.4
400
Typ
0.9
450
Max
10
-30.3
Max
1.25
10
Unit
mV
mV
ns
µV
µA
mV
ns
Unit
Ω
µA
ns
Preliminary
© Cambridge Semiconductor Ltd 2009
Page 11
DS-2918-0906
12-Jun-2009
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet C2162PX2.PDF ] | |
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