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C2161 PDF даташит

Спецификация C2161 изготовлена ​​​​«Cambridge Semiconductor» и имеет функцию, называемую «flyback controllers».

Детали детали

Номер произв C2161
Описание flyback controllers
Производители Cambridge Semiconductor
логотип Cambridge Semiconductor логотип 

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C2161 Даташит, Описание, Даташиты
C2161 & C2162 flyback controllers
Meet tough new mobile phone no-load requirements to 5 star standard (<30 mW)
Primary Side Sensing flyback controllers eliminate the need for secondary feedback circuitry such as opto-
couplers, thereby reducing BOM costs
Meet ENERGY STAR 2.0 and EU Code of Conduct V4.0 efficiency requirements (Level V)
Overview
CamSemi C2161 and C2162 primary side sensing
(PSS) quasi-resonant flyback controllers are aimed at
applications up to 8 watts.
These two controllers offer very low no-load power
requirements found in today’s applications, such as
mobile phone chargers, but also easily programmable
frequency, cable compensation, quasi-resonant
switching and protection features.
No Load Power 5 Star Requirements
No-Load Power Consumption
Mobile Chargers
Five Star (30 mW)
PSS_C2160_AD-2967
PSS_C2160_AD-3115
PSS_C2160_AD-2968
PSS_C2160_AD-2971
40
PSS_C2160_AD-2967
PSS_C2160_AD-3115
PSS_C2160_AD-2968
PSS_C2160_AD-2971
Applications
Typical low power applications include:
Mobile phones
Cordless telephones
Digital cameras
Bluetooth headsets
MP3 chargers
Portable games
LED Lighting
Typical Application Circuit
Figure 1: Typical application circuit 8 W
No Load Power
The C2161 and C2162 controllers meet the toughest
new mobile phone 5 star standard of <30 mW.
No-Load consumption score chart
Five stars = most energy efficient

0.03 W
CamSemi controllers
C2161/C2162
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Rated (Nameplate) Power (W)
Figure 2: CamSemi demos vs no-load star rating
Efficiency
C2161 and C2162 controllers can help manufacturers
easily achieve new requirements such as ENERGY
STAR 2.0 and European Code of Conduct v4.0 (Level
V).
Efficiency achieved > Energy Star 2.0
Average Efficiency
AC-DC External Power Supplies
Energy Star V2.0 (level V) & EU CoC V4
Energy Star V1.1 (level IV) & CEC
PSS_C2160_AD-2971
PSS_C2160_AD-2968
Energy Star V2.0 (level V) & EU CoC V4 Low Voltage
PSS_C2160_AD-3115
PSS_C2160_AD-2967
85%
80%
75%
70%
65%
60%
55%
50%
0
PSS_C2160_AD-3115
PSS_C2160_AD-2968
PSS_C2160_AD-2967
PSS_C2160_AD-2971
123
Rated (Nameplate) Power (W)
4
5
Figure 3: CamSemi demo vs Energy Star 2.0
© Copyright Cambridge Semiconductor Ltd 2010
BN-3214-0814









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C2161 Даташит, Описание, Даташиты
Regulation
The controllers achieve constant voltage and constant
current output without the need for any secondary
sensing components (i.e. opto-coupler circuit) by
sensing the primary side waveforms of transformer
voltage and primary switch current.
Quasi-Resonant (Valley) Switching
CamSemi C2161 and C2162 controllers use quasi-
resonant (valley) switching techniques to improve
both efficiency and EMI.
VAUX
Figure 4: Achievable charger output characteristic
using C2161 or C2162 controllers
BOM and Inventory Costs
The removal of the opto-coupler circuits eliminates
up to 10 components needed in a conventional
flyback or RCC circuit.
The use of low cost bipolar transistors also reduces
cost.
Cable Compensation
The controllers adjust the output voltage of the power
supply to compensate for the voltage drop seen in the
output cable. This allows the required application
voltage to be seen at the output end of the cable
rather than at the output of the power supply into the
cable. This function is fully programmable to take into
account different cable gauges and lengths.
V
Output of supply at cable
connection
Output at
end of
cable
I-R drop due to cable
resistance
CHARGE
Valley points
DCHARGE
Zero current (quasi-resonant) switching is used to
minimise the switching losses in the primary switch.
The bipolar switch is turned on when the voltage
across it is at a minimum (in a valley) to minimise
the captive switching losses and improve efficiency.
Switching the bipolar switch when the voltage is at a
minimum helps reduce the hard switching effect that
causes EMI.
Switching when a valley is detected – rather than at
a fixed frequency - introduces frequency jitter. This
has the benefit of spreading the RF emissions
spectrum and reducing EMI overall.
Protection Features
Input Over Voltage Protection - OVP
Input Under Voltage Protection - UVP
Over Temperature Protection - OTP
Transistor Over Current Protection - OCP
Controller Series
The following controller options are available:
Part Number
C2161
C2162
Output Power W
1-4 W
4-8 W
Package
SOT23-6
SOT23-6
For more Information
For details of our channel partners and information on
future product, technology or corporate updates, visit
www.camsemi.com
I
Contact Information
European Design Centre
CamSemi
St Andrews House
St Andrews Road
Cambridge, CB4 1DL
United Kingdom
Taiwan Design Centre
CamSemi
6F, No.58, Zhouzi St.,
Neihu District,
Taipei City 114,
Taiwan (R.O.C.)
Tel: +44 1223 446450
Tel: +886 2 8178 1010
China Design Centre
Room 201, 2F
Shenzhen Academy of
Aerospace Technology,
Tower B, 10th Kejinan Rd.
Nanshan District,
Shenzhen, China 518057
Tel: +86 755 8611 7778
© Copyright Cambridge Semiconductor Ltd 2010
BN-3214-0814










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