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参数资料
| 型号： | SG1577SZ |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM VM 20-SOP |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 352kHz |
| 占空比： | 95% |
| 电源电压： | 8 V ~ 15 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 标准包装 |
| 产品目录页面： | 1222 (CN2011-ZH PDF) |
| 其它名称： | SG1577SZDKR |
November 2012
SG1577
Dual Synchronous DC/DC Controller
Features
Description
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Integrated Two Sets of MOSFET Drivers
Two Independent PWM Controllers
Constant Frequency Operation: Free-running Fixed
Frequency Oscillator Programmable: 60 kHz to
320 kHz
Wide Range Input Supply Voltage: 8~15 V
Programmable Output as Low as 0.7 V
Internal Error Amplifier Reference Voltage:
0.7 V ±1.5%
Two Soft-Start / EN Functions
Programmable Over-Current Protection (OCP)
30 V HIGH Voltage Pin for Bootstrap Voltage
Output Over-Voltage Protection (OVP)
SOP 20-Pin
The SG1577 is a high-efficiency, voltage-mode, dual-
channel, synchronous DC/DC PWM controller for two
independent outputs. The two channels are operated
out of phase. The internal reference voltage is trimmed
to 0.7 V ±1.5%. It is connected to the error amplifier’s
positive terminal for voltage feedback regulation. The
soft-start circuit ensures the output voltage can be
gradually and smoothly increased from zero to its final
regulated value. The soft-start pin can also be used for
chip-enable function. When two soft-start pins are
grounded, the chip is disabled and the total operation
current can be reduced to under 0.55 mA. The fixed-
frequency is programmable from 60 kHz to 320 kHz.
The Over-Current Protection (OCP) level can be
programmed by an external current sense resistor. It
has two integrated sets of internal MOSFET drivers.
SG1577 is available in the 20-pin SOP package.
Applications
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CPU and GPU Vcore Power Supply
Power Supply Requiring Two Independent Outputs
Ordering Information
Part Number
SG1577SY
Operating
Temperature Range
-40°C to +85°C
Package
20-Lead, Small Outline Package (SOP-20)
Packing
Method
Tape & Reel
? 2009 Fairchild Semiconductor Corporation
SG1577 ? Rev. 1.0.6
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SG15A | 制造商:BILIN 制造商全称:Galaxy Semi-Conductor Holdings Limited 功能描述:FAST RECOVERY RECTIFIERS |
| SG15B | 制造商:BILIN 制造商全称:Galaxy Semi-Conductor Holdings Limited 功能描述:FAST RECOVERY RECTIFIERS |
| SG15D | 制造商:BILIN 制造商全称:Galaxy Semi-Conductor Holdings Limited 功能描述:FAST RECOVERY RECTIFIERS |
| SG15G | 制造商:BILIN 制造商全称:Galaxy Semi-Conductor Holdings Limited 功能描述:FAST RECOVERY RECTIFIERS |
| SG15J | 制造商:BILIN 制造商全称:Galaxy Semi-Conductor Holdings Limited 功能描述:FAST RECOVERY RECTIFIERS |
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