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參數(shù)資料
| 型號(hào)： | TB62756FUG |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1430 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 0.95 MM PITCH, LEAD FREE, PLASTIC, SSOP-6 |
| 文件頁(yè)數(shù)： | 11/16頁(yè) |
| 文件大小： | 314K |
| 代理商： | TB62756FUG |
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TB62756FUG
2006-06-14
4
Application Circuit Example
Protection at the Time of LED Opening
The zener diode in the application circuit example is necessary for the provision of over-voltage protection for
when the LED becomes open. As the IC does not incorporate a voltage protection circuit, it is strongly advised that
a zener diode be connected.
The zener diode should satisfy the following conditions:
i)
Less than maximum output voltage of 24 V
ii)
Greater than the total series LED VF
iii) Less than the maximum output capacitance C2.
Moreover, by connecting a protection circuit such as RZD in the figure below, it is possible to control the output
current when the LED becomes open, and to use a zener diode of lower tolerance.
An example of IZD control by RZD connection. (RSENS = 16 )
RZD ()
IZD (mA)
500
0.6 (typ.)
100
2.8 (typ.)
In order to avoid adverse effects on driver characteristics,
Toshiba recommends a resistance of 500
or less.
3
5
2
4
Monostable
multivibrator
for
reference
Circuit
on/off
6
1
SW
NC
FB
GND
SHDN
VIN
Monostable
multivibrator
for
off time control
Error
AMP.
CTL
AMP.
PWM
2.
2
F
VIN
4.7 to 10
H
V
Z
=24
V
1
F
16
@2
0
m
A
500
SW
GND FB
S-Di
IZD
1
F
C2
RZD
RSENS
IF
Protection Circuit Application
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TB62756FUG(O,EL) | 功能描述:LED照明驅(qū)動(dòng)器 White LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TB62757FPG(O,EL) | 功能描述:LED照明驅(qū)動(dòng)器 White LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TB62757FUG(O,EL) | 功能描述:LED照明驅(qū)動(dòng)器 White LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TB62758FTG(O,EL) | 制造商:Toshiba 功能描述:LED Driver IC |
| TB62763FMG(O,8,EL) | 制造商:Toshiba America Electronic Components 功能描述:Step Up Type DC-DC Converter |
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