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參數(shù)資料
| 型號： | SI9160 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Controller for RF Power Amplifier Boost Converter |
| 中文描述： | 射頻功率放大器控制器升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 119K |
| 代理商： | SI9160 |
Si9160
Vishay Siliconix
www.vishay.com
8
Document Number: 70029
S-40700—Rev. H, 19-Apr-04
OPERATION OF THE SI9160 BOOST CONVERTER
The Si9160 combined with optimized complementary
MOSFETs provides the ideal solution to small, high efficiency,
synchronous boost power conversion. Optimized for a 1-cell
lithium ion, or 3-cell to 4-cell Nickel metal hydride battery, it is
capable of switching at frequencies of up to 2 MHz. Combined
with the Si6801, a complimentary high-frequency MOSFET,
efficiencies of over 90% are easily achieved in a very small
area.
PWM Controller
The Si9160 implements a synchronous voltage mode PWM
control topology and is especially designed for battery power
conversion. Voltage-mode control results in the most efficient
power conversion solution. Figure 1 below illustrates a
schematic for a synchronous boost converter with an input
range of 2.7 V to 5 V which covers the range of 1-cell LiIon and
3-cell or 4-cell NiMH/NiCd battery input respectively, and an
output voltage of 6 V. Note the maximum input voltage is limited
to the output voltage for a boost converter.
The switching frequency is determined by an external
capacitor and resistor connected to C
osc
and R
osc
pins. The
graph on page 5 in the Typical Characteristics section shows
the typical C
osc
and R
osc
values for various switching
frequency. Si9160 oscillator frequency can be easily
synchronized to external frequency as long as external
switching frequency is higher than the internal oscillator
frequency. The synchronization circuit is a series resistor and
capacitor fed into the C
osc
pin of the Si9160. The
synchronization pulse should be greater than 1.5 V in
amplitude and a near square wave pulsed clock. Figure 1
shows typical values for the synchronization components.
Startup
Designed to operate with single cell Lithium Ion battery
voltage, the Si9160 has an operating range of 2.7 V to 6.0 V.
During start-up, the device requires 3.0 V to guarantee proper
operation, although it will typically start up at less than 2.2 V.
Once powered, Si9160 will continue to operate until the
voltage at V
DD
is 2.7 V; at this point, the battery is basically
dead. During start-up, power for the chip is provided by the
battery through schottky diode D1 to V
DD
and V
S
pins. Once
the converter is fully operating, supply power is provided by the
converter output through diode D2, which overrides the D1
diode. This self perpetuating method of powering further
improves the converter efficiency by utilizing higher gate drive
to lower the on-resistance loss of the MOSFET.
FIGURE 1.
Si9160 Boost Converter
ML
C4
10 F
13
12
Si9160
14
15
16
2
3
4
5
6
7
8
1
10
9
11
C11
36 pF
R6
12 k
C3
0.1 F
R3
2.2 k
D
R
D
S
V
DD
NC
D
MAX
COMP
FB
NI
V
REF
GND
V
S
P
GND
UVLO
SET
C
OSC
R
OSC
ENABLE
C2
0.1 F
C10
0.1 F
R5
100 k
C5
0.1 F
R1
10 k
C4
0.1
F
C6
22 pF
R4
2.2 k
C10
0.33 F
5
6
7
8
2
3
4
1
S2
S2
G2
D1
S1
S1
G1
D2
C8
5600 pF
R9
100
R10
3.6 k
R11
1.2 k
C9
0.1 F
ML
C3
10 F
ML
C1
10 F
D1
LS4148
D2
LS4148
ML
C2
10 F
4.7 H
Si6801
R2, 270
SYNC
1-Cell
LiIon
Power
Amplifier
相關(guān)PDF資料 |
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| Si9160BQ-T1 | Controller for RF Power Amplifier Boost Converter |
| Si9160BQ-T1-E3 | Controller for RF power amplifier boost |
| SI9165 | High Frequency 600-mA Synchronous Buck/Boost Converter |
| SI9166 | High Frequency Programmable Topology Controller |
| SI9167 | High-Frequency, High-Efficiency Buck Converter Design For Multi-Cell Battery Configured Systems Using Si9167 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9160BQ-T1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2MHz Controller RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| SI9160BQ-T1-E3 | 功能描述:DC/DC 開關(guān)控制器 Boost Conv For RF Pwr Amp RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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 安裝風格: 封裝 / 箱體:CPAK |
| SI9160DB | 功能描述:電源管理IC開發(fā)工具 SI9160 Demo Board RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| SI9161 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Optimized-Efficiency Controller for RF Power Amplifier Boost Converter |
| SI9161BQ-T1 | 功能描述:DC/DC 開關(guān)控制器 Opt-Efficiency Cont RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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 安裝風格: 封裝 / 箱體:CPAK |
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