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参数资料
| 型号： | L6591TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO16 |
| 封装： | ROHS COMPLIANT, SOP-16 |
| 文件页数： | 11/32页 |
| 文件大小： | 560K |
| 代理商： | L6591TR |
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L6591
Application information
Doc ID 14821 Rev 4
19/32
Figure 12.
Operation after latched disable activation: timing diagram
This function is useful to implement a latched over temperature protection very easily by
biasing the pin with a divider from VREF, where the upper resistor is an NTC physically
located close to a heating element like the MOSFET, or the secondary diode or the
transformer. An OVP can be implemented as well, e.g. by sensing the output voltage and
transferring an overvoltage condition via an optocoupler.
5.6
Oscillator and dead-time programming
The oscillator is programmed externally by means of a resistor-capacitor network (RT, CT)
connected from pin OSC (#5) to VREF (#6) and to ground respectively. Once chosen the
oscillator frequency and the dead-time duration needed, the values of RT and CT can be
calculated as:
Equation 1
Equation 2
After having selected the commercial values for RT and CT, the oscillator frequency (fosc)
can be verified with good approximation using the following formula:
Vcc
LVG, H VG
Vin
t
4.5V
DIS
HV generator is turn ed on
PFC_STOP
Vccon
Vcc
off
Vccrestart
VHstart
Vcc
on -1
Disable latch is reset here
HV gen erator tu rn-on is disabled here
Inpu t sou rce i s re moved he re
()9
d
osc
T
10
125
T
f
1150
50
R
+
=
()
50
R
1200
R
f
1
39
.
1
C
T
osc
T
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6598 | 功能描述:PMIC 解决方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| L6598_04 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HIGH VOLTAGE RESONANT CONTROLLER |
| L6598D | 功能描述:PMIC 解决方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| L6598D013TR | 功能描述:PMIC 解决方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| L6598D016TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:High voltage resonant controller |
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