C6182 Datasheet
Primary Sensing SMPS Regulator for Offline Applications
KEY FEATURES AND ADVANTAGES
• Advanced primary sensing control circuitry achieves accurate voltage and current (CV and CC) regulation without an opto-coupler
• Integrated primary switch and start-up device support application designs with very low component count
SOP-8
• Advanced insulated gate bipolar transistor (IGBT) technology provides a primary switch that is robust, reliable and avalanche-capable
• Integrated start-up switch enables very fast turn-on with no impact on no-load power
• Optimised PWM/PFM with quasi-resonant switching enables efficiency standards compliance with margin
• Enables fully compliant solutions for “MoU” Common External Power Supply universal USB chargers
o Switching frequency dither and edge rate control of the primary switch gate drive ease design for low EMI and compliance to EN 301 489-34 with margin
o Inherently low ripple and low EMI enable compliance with the interoperability standard, IEC 62684
• Best in class load-transient performance and no-load power less than 30 mW for five-star chargers
• Full featured protection includes
o Single fault and over-temperature
o Output over-voltage and short-circuit
o Input under-voltage
• Convenient surface mount SOP-8 package for small size and low cost manufacture
APPLICATIONS
Universal input chargers for mobile phones, including “universal” USB and all major OEM specifications Universal standby and auxiliary power supplies up to 3.5 W.
Figure 1: Typical Application Circuit
Shortform © Cambridge Semiconductor Ltd 2012
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DS-3653-1209 12-Sep-2012
C6182 Datasheet
Primary Sensing SMPS Regulator for Offline Applications
BLOCK DIAGRAM
Figure 2: C6182 Block Diagram
PIN DEFINITIONS
D High voltage connection to the drain of the primary switch and the start-up switch.
NC Not connected. AUX During Run mode, power derived from the
transformer auxiliary winding is fed to the control circuitry via the AUX pin. FB The FB input provides feedback to the control circuitry by monitoring the transformer voltage waveform. VDD Connection for capacitive decoupling of the internal power supply. GND Power and signal ground. CS Primary current sense, via Rcs (see Figure 3).
SOP-8
Shortform © Cambridge Semiconductor Ltd 2012
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DS-3653-1209 12-Sep-2012
C6182 Datasheet
Primary Sensing SMPS Regulator for Offline Applications
TYPICAL APPLICATION
Parameter Supply voltage Output voltage Output current Switching frequency at full load Output cable resistance Cable compensation No-load power Average efficiency Turn-on delay Undershoot voltage
Symbol VIN
VOUTCV IOUTCC fMAX RCAB GCAB
PNL η TON VUNDERSHT
Range or Value 85 - 264 5 630 65 0.639 6.7 26 > 70 < 0.1 > 4.3
Units Vac
V mA kHz Ω % mW % s V
Comment Universal mains Constant voltage mode, at the load Constant current mode Determined by the chosen variant Typical of a 1.5 m, 28 AWG output cable Determined by the chosen variant
Energy Star test method (minimum is 64.3%) Enabled by active start-up device Load step from 0 to 0.5 A
Figure 3: Typical Universal Input, Five Star USB Charger Using C6182
By sensing the primary-side waveforms of transformer voltage and primary current, the C6182 achieves constant voltage and constant current output within tight limits without the need for any secondary-side sensing components. Figure 4 shows the output characteristics of a typical charger implementation.
Figure 4: Typical CV/CC Output Characteristic Achieved Using C6182
Shortform © Cambridge Semiconductor Ltd 2012
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DS-3653-1209 12-Sep-2012
C6182 Datasheet
Primary Sensing SMPS Regulator for Offline Applications
DATASHEET STATUS
The status of this Datasheet is shown in the footer.
Datasheet Status Product preview Preliminary Pre-production Product data
Product Status
In definition and design
In prototyping and pre-qualification
In pre-production and qualification
In production
Nature of Datasheet Content Target specifications for design and development of the described product.
Preliminary specifications of functionality and performance which are supported by results from testing of initial prototypes. Specifications of functionality and performance which are supported by results from testing of pre-production units. Specifications relating to functionality and performance which are supported by results from testing of pre-production and production units.
CONTACT DETAILS
Cambridge Semiconductor Ltd St Andrew’s House St Andrew’s Road Cambridge CB4 1DL United Kingdom
Phone: +44 (0)1223 446450 Fax: +44 (0)1223 446451 Email:
[email protected] Web: www.camsemi.com
DISCLAIMER
The product information provided herein is believed to be accurate and is provided on an “as is” basis. Cambridge Semiconductor Ltd (CamSemi) assumes no responsibility or liability for the direct or indirect consequences of use of the information in respect of any infringement of patents or other rights of third parties. .