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参数资料
| 型号： | SG1577SZ |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 4/14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 |
Pin Configuration
Figure 4. SOP-20 Pin Configuration (Top View)
Pin Definitions
Name
Pin #
Type
Description
Switching frequency programming pin. An external resistor connecting from
RT
1
Frequency Select
this pin to GND can program the switching frequency. The switching
frequency would be 60 kHz when RT is open and become 320 kHz when a
30 k Ω RT resistor is connected.
IN1
COMP1
SS1/ENB
CLP1
BST1
DH1
CLN1
DL1
PGND
VCC
DL2
CLN2
DH2
BST2
CLP2
SS2/ENB
COMP2
IN2
GND
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Feedback
Compensation
Soft Start/Enable
Over Current
Protection
Boost Supply
High-Side Drive
Switch Node
Low-Side Drive
Driver Ground
Power Supply
Low-Side Drive
Switch Node
High-Side Drive
Boost Supply
Over-Current
Protection
Soft-Start/Enable
Compensation
Feedback
Control Ground
Inverting input of the error amplifier. It is normally connected to the
switching power supply output through a resistor divider.
Output of the error amplifier and input to the PWM comparator. It is used
for feedback loop compensation.
A 10 μA internal current source charging an external capacitor for soft start.
Pull down this pin and pin 17 can disable the chip.
Over-current protection for high-side MOSFET. Connect a resistor from this
pin to the high-side supply voltage to program the OCP level.
Supply for high-side driver. Connect to the internal bootstrap circuit.
Channel 1, high-side MOSFET gate driver pin.
Switch-node connection to inductor. For channel 1 high-side driver’s
reference ground.
Low-side MOSFET gate driver pin.
Driver circuit GND supply. Connect to low-side MOSFET GND.
Supply voltage input.
Low-side MOSFET gate driver pin.
Switch-node connection to inductor. For channel 2, high-side driver’s
reference ground.
Channel 2 high-side MOSFET gate driver pin.
Supply for high-side driver. Connect to the internal bootstrap circuit.
Over-current protection for the high-side MOSFET. Connect a resistor from
this pin to the high-side supply voltage to program the OCP level.
A 10 μA internal current source charging an external capacitor for soft start.
Pull down this pin and pin 4 can disable the chip.
Output of the error amplifier and input to the PWM comparator. It is used
for feedback-loop compensation.
Inverting input of the error amplifier. It is normally connected to the
switching power supply output through a resistor divider.
Control circuit GND supply.
? 2009 Fairchild Semiconductor Corporation
SG1577 ? Rev. 1.0.6
4
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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