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參數(shù)資料
| 型號(hào)： | SI9145 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Low-Voltage Switchmode Controller |
| 中文描述： | 低電壓開(kāi)關(guān)模式控制器 |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 74K |
| 代理商： | SI9145 |
Si9145
Vishay Siliconix
Document Number: 70021
S-40710—Rev. K, 19-Apr-04
www.vishay.com
1
Low-Voltage Switchmode Controller
FEATURES
2.7-V to 7-V Input Operating Range
Voltage-Mode PWM Control
High-Speed, Source-Sink Output Drive (200 mA)
Internal Oscillator (up to 2 MHz)
Standby Mode
0
100% Controllable Maximum Duty-Cycle
DESCRIPTION
The Si9145 switchmode controller IC is ideally suited for high
efficiency dc/dc converters in low input voltage systems.
Operation is guaranteed down to 2.7 V, with a minimum
start-up voltage of 3.0 V making the Si9145 ideal for use with
NiCd, NMH, and lithium ion battery packs. A mode select pin
allows the output driver polarity to be programmed allowing the
device to function as a step-up or step-down converter.
Features include a precision bandgap reference, a wide
bandwidth error amplifier, a 2-MHz oscillator, an input voltage
monitor with standby mode and a 200-mA output driver.
Supply current in normal operation is typically 1.1 mA and
250 A in standby mode.
The Si9145 implements conventional voltage mode control.
The maximum duty cycle in boost mode can be limited by
voltage on D
MAX
/SS pin. Frequency can be externally
programmed by selection of R
OSC
and C
OSC
.
The Si9145 is available in both standard and lead (Pb)-free
16-pin SOIC and TSSOP packages and is specified over the
industrial temperature range (
25 C to 85 C).
FUNCTIONAL BLOCK DIAGRAM
+
UVLO
SET
D
MAX
/SS
COMP
C
OSC
FB
NI
V
S
OUTPUT
P
GND
GND
V
UVLO
Oscillator
OTS
Temp
Sense
V
REF
1.5-V Reference
Generator
R
OSC
ENABLE
MODE SELECT
V
DD
UVLO
Error Amp
S
R
Logic
Control
+
+
Driver
Pentium is a trademark of Intel Corporation. PowerPC is a trademark of IBM.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9145BQ | 制造商:Vishay Siliconix 功能描述: |
| SI9145BQ-E3 | 功能描述:DC/DC 開(kāi)關(guān)控制器 Lo V-Hi Freq Swmode Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| SI9145BQ-T1 | 功能描述:電壓模式 PWM 控制器 Lo V-Hi Freq Swmode Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| SI9145BQ-T1-E3 | 功能描述:DC/DC 開(kāi)關(guān)控制器 Lo V-Hi Freq Swmode Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| SI9145BY | 功能描述:電壓模式 PWM 控制器 Low Volt SMP Cont RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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