HOTCHIP HT2263
HT2263 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications in sub 30W range. HT2263 offers complete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and under voltage lockout (UVLO).| Part No. | HT2263 |
|---|---|
| Datasheet | HT2263 Download |
| Manufacturer |  HOTCHIP |
| Description | Current Mode PWM Controller |
| Buy | Stock & Price |
GENERAL DESCRIPTION
PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved. VDD low startup current and low operating current contribute to a reliable power on startup design with HT2263. A large value resistor could thus be used in the startup circuit to minimize the standby power. The internal slope compensation improves system large signal stability and reduces the possible sub-harmonic oscillation at high PWM duty cycle output. Leading-edge blanking on current sense(CS) input removes the signal glitch due to snubber circuit diode reverse recovery and thus greatly reduces the external component count and system cost in the design. The Gate-drive output is clamped to maximum 18V to protect the power MOSFET. Excellent EMI performance is achieved with frequency shuffling technique together with soft switching control at the totem pole gate drive output.
