- 您现在的位置：买卖IC网 > PDF目录67674 > HA17723 ADJUSTABLE POSITIVE REGULATOR, PDIP14 PDF资料下载
参数资料
| 型号： | HA17723 |
| 元件分类： | 可调正电压单路输出标准稳压器 |
| 英文描述： | ADJUSTABLE POSITIVE REGULATOR, PDIP14 |
| 封装： | DP-14 |
| 文件页数： | 14/17页 |
| 文件大小： | 89K |
| 代理商： | HA17723 |
HA17723/F/P
6
Negative Voltage Regulator: Figure 3 shows the construction of a so-called negative voltage regulator,
which generates a negative output voltage with regard to GND. Assume that the output voltage, –V
OUT,
increases in the negative direction. As the voltage across the R
1 is larger than that across the R3, which
provides the reference voltage, the output current of the error amplifier increases. In the control circuit, the
impedance decreases with the increase of input current, which makes the base current of the external
transistor Q approach GND. As a result, the output voltage returns to the established value and output
voltage is stable.
The output voltage –VOUT of this circuit is:
–VOUT = –
= –
VREF
×
VREF
×
R3
R3 + R4
(R1 + R2) (R3 + R4)
R2 (R3 + R4) – R4 (R1 + R2)
R1 + R2
R3 + R4
R3
R1
CL
CS
COMP
VIN
VC
VREF
VIN(+) VIN(–)
VOUT
VZ
C1
100pF
R2
11.5k
R5
2k
R4
3k
R3
3k
R1
3.65k
VCC
VEE
Q
Figure 3 Negative Voltage Regulator
How to Increase the Output Current: To increase the output current, you must increase the current
capacity of the control circuit. Figures 4 and 5 show examples with external transistors.
CL
CS
COMP
VIN
VCC
VEE
VREF
RSC
0.7
R1
7.87k
R2
7.15k
C1
500pF
VOUT
VIN(+)
VIN(–)
VC
Q
Figure 4 Increasing Output Current (1)
相关PDF资料 |
PDF描述 |
|---|---|
| HA17805VPJ | 5 V FIXED POSITIVE REGULATOR, PSFM3 |
| HA17805V | 5 V FIXED POSITIVE REGULATOR, PSFM3 |
| HA17806VPJ | 6 V FIXED POSITIVE REGULATOR, PSFM3 |
| HA17806VP | 6 V FIXED POSITIVE REGULATOR, PSFM3 |
| HA17806V | 6 V FIXED POSITIVE REGULATOR, PSFM3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HA17723F | 制造商:HITACHI 制造商全称:Hitachi Semiconductor 功能描述:Precision Voltage Regulator |
| HA17723P | 制造商:HITACHI 制造商全称:Hitachi Semiconductor 功能描述:Precision Voltage Regulator |
| HA17741 | 制造商:HITACHI 制造商全称:Hitachi Semiconductor 功能描述:General-Purpose Operational Amplifier (Frequency Compensated) |
| HA17741/PS | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| HA17741PS | 制造商:HITACHI 制造商全称:Hitachi Semiconductor 功能描述:General-Purpose Operational Amplifier (Frequency Compensated) |
发布紧急采购，3分钟左右您将得到回复。