ICE2QR2280G-1_15 Datasheet, PDF (4/14 Pages) Infineon Technologies AG – 20 W 5 V SMPS Evaluation Board with Quasi- Resonant CoolSET™ ICE2QR2280G-1

20 W 5 V SMPS Evaluation Board with
Quasi-Resonant CoolSET™ ICE2QR2280G-1
Specification of evaluation board
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Specification of evaluation board
Table 1 Specification of EVAL ICE2QR2280G-1
Input voltage
Input frequency
Output voltage, current & power
Minimum switching frequency at full load and minimum input AC
voltage
No-load power consumption
Active mode four point average efficiency (25%,50%,75% & 100%load)
85 VAC~265 VAC
50~60 Hz
5 V, 4 A, 20 W
65 kHz
< 50 mW
>80% at 115 VAC & 230 VAC
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Features of ICE2QR2280G-1
Table 2 Features of ICE2QR2280G-1
800 V avalanche rugged CoolMOS™ with built-in startup Cell
Quasi resonant operation till very low load
Active burst mode operation for low standby input power (< 0.1 W)
Digital frequency reduction with decreasing load for reduced switching loss
Built-in digital soft-start
Foldback point correction, cycle-by-cycle peak current limitation and maximum on time limitation
Auto restart mode for VCC over-voltage protection, under-voltage protection, over-load protection and
overtemperature protection
Latch-off mode for adjustable output over-voltage protection and transformer short-winding protection
Lower VCC turn off threshold
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Circuit description
5.1
Mains input rectification and filtering
The AC line input side comprises the input fuse F1 as overcurrent protection. The X2 Capacitors C1 and
Choke L1 form a main filter to minimize the feedback of RFI into the main supply. After the bridge rectifier
BR1, together with a smoothing capacitor C2, provide a voltage of 70 VDC to 380 VDC depending on mains
input voltage.
5.2
Integrated MOSFET and PWM control
ICE2QR2280G-1 is comprised of a power MOSFET and the Quasi-Resonant controller; this integrated solution
greatly simplifies the circuit layout and reduces the cost of PCB manufacturing. The PWM switch-on is
determined by the zero-crossing input signal and the value of the up/down counter. The PWM switch-off is
determined by the feedback signal VFB and the current sensing signal VCS. ICE2QR2280G-1 also performs all
necessary protection functions in flyback converters. Details about the information mentioned above are
illustrated in the product datasheet.
Application Note
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Revision 1.1, 2015-04-02