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S3843 参数 Datasheet PDF下载

S3843图片预览
型号: S3843
PDF下载: 下载PDF文件 查看货源
内容描述: 电流模式PWM控制器 [Current Mode PWM Controller]
分类和应用: 控制器
文件页数/大小: 8 页 / 296 K
品牌: AUK [ AUK CORP ]
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Semiconductor
S3843
Current Mode PWM Controller
Descriptions
The S3843 is fixed Current PWM controller for Off-line and DC-DC converter applications.
The internal circuits feature a trimmed oscillator for precise duty cycle control, a
temperature compensated reference, high gain error amplifier current sensing comparator,
and a high current totempole output for driving a power MOSFET. Protection circuitly
includes built in under voltage lockout and current limiting. S3843 have UVLO threshold of
8.4V(on) and 7.6V(off) , S3843 can operate within 100% duty cycle.
Features
Optimized for off-line and DC to DC converters
Low start up current < 1 mA
Operating range up to 500 KHz
Pulse-by-pulse current limiting
Under Voltage Lock Out with hysteresis
High current totempole output
Short shutdown delay time ; typical 100nsec
Ordering Information
Type NO.
S3843
Marking
S3843
Package Code
SOP-8
Outline Dimensions
unit :
mm
PIN Connections
1. Output / Compensation
2. Voltage feedback. Input
3. Current sense Input
4. Rt/Ct
5. GND
6. Output
7. Vcc
8. Vref
KSI-8007-001
1