参数资料
型号: CS5124XDR8
厂商: ON SEMICONDUCTOR
元件分类: 稳压器
英文描述: 1.5 A SWITCHING CONTROLLER, 440 kHz SWITCHING FREQ-MAX, PDSO8
封装: SOIC-8
文件页数: 7/11页
文件大小: 168K
代理商: CS5124XDR8
CS5124
http://onsemi.com
5
PACKAGE PIN DESCRIPTION
PIN #
Pin
Description
1
VCC
VCC Power Input Pin.
2
BIAS
VCC Clamp Output Pin. This pin will control the gate of an Nchannel MOSFET that in turn regulates Vcc. This pin is
internally clamped at 15 V when the IC is in sleep mode.
3
UVLO
Sleep and under voltage lockout pin. A voltage greater than 1.8 V causes the chip to “wake up” however the GATE
remains low. A voltage greater than 2.6 V on this pin allows the output to switch.
4
SS
SoftStart Capacitor Pin. A capacitor placed between SS and GROUND is charged with 10 mA and discharged with
10 mA. The SoftStart capacitor controls both SoftStart time and hiccup mode frequency.
5
VFB
Voltage Feedback Pin. The collector of an optocoupler is typically tied to this pin. This pin is pulled up internally by a
4.3 kW resistor to 5.0 V and is clamped internally at 2.9 V (2.65 V). If VFB is pulled > 4.0 V, the oscillator is disabled
and GATE will stay high. If the VFB pin is pulled < 0.49 V, GATE will stay low.
6
ISENSE Current Sense Pin. This pin is connected to the current sense resistor on the primary side. If VFB is floating, the
GATE will go low if ISENSE = 195 mV (335 mV). If ISENSE > 275 mV (525 mV), SoftStart will be initiated.
7
GATE
Gate Drive Output Pin. Capable of driving a 3.0 nF load. GATE is nominally clamped to 13.5 V.
8
GND
Ground Pin.
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