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Unisonic Technologies - CURRENT MODE PWM POWER SWITCH

Numéro de référence US3706
Description CURRENT MODE PWM POWER SWITCH
Fabricant Unisonic Technologies 
Logo Unisonic Technologies 





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US3706 fiche technique
UNISONIC TECHNOLOGIES CO., LTD
US3706
Preliminary
CURRENT MODE PWM POWER
SWITCH
CMOS IC
DESCRIPTION
The UTC US3706 combines a dedicated current mode PWM
controller with a high voltage power MOSFET. Low VDD startup
current make the power reliable on startup design and a large
value resistor could be used in the startup circuit to minimize the
standby power. At no load condition, the IC operates in
power-saving mode for lower standby power, decreasing frequency
for Higher conversion efficiency at light load condition.
The UTC US3706 offers complete protection coverage with
automatic self-recovery feature including Cycle-by-Cycle current
limiting (OCP), over load protection (OLP), over temperature
protection (OTP), over voltage protection and VDD under
voltage lockout (UVLO).
The internal slope compensation improves system stability at
high PWM duty cycle output. Leading-edge blanking on current
sense input removes the signal glitch, which offering minimal
external component count in the design. Excellent EMI
performance is achieved with UTC proprietary frequency hopping
technique (ZL201020615247.1) together with soft driver control.
Audio noise is eliminated due to switch frequency more than 20kHz
during operation.
The US3706 has such applications as: battery charger, power
adaptor, set-top box power supplies, ink jet printers, open-frame
SMPS.
1
FEATURES
* UTC proprietary frequency hopping technology for
* OLP,OVPand OTP for higher security
Improved EMI performance.
* Fixed switch frequency 65kHz
* Power-saving mode for high light-load and standby
* Low start-up current
efficiency
* Cycle-by-cycle Current Limiting
* Soft Start
* Under voltage lockout (UVLO)
* Dynamic peak current limiting for constant output power * Leading edge blanking on source input
* Built-in synchronized slope compensation
* Few external components required
TO-220F-6
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
US3706L-TF6-T
US3706G-TF6-T
Package
TO-220F-6
Packing
Tube
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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