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參數資料
| 型號： | FAN5037 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 隔離反激式開關穩壓9V輸出 |
| 文件頁數： | 6/11頁 |
| 文件大小： | 101K |
| 代理商： | FAN5037 |
FAN5037
PRODUCT SPECIFICATION
6
REV. 1.0.3 9/26/01
Table1. Bill of Materials for a FAN5037 3.3V, 13A Application
Qty.
3
3
Reference
C1, C7-8
C2-4
Manufacturer
Part Order #
Any
Sanyo
10MV1200GX
Any
Any
Sanyo
6MV1500GX
Any
Any
N/A
Description
Requirements
and Comments
100nF, 25V Capacitor
1200μF, 10V Aluminum Capacitor
I
(2) in Applications
RMS
= 2A , See Equation
1
1
6
C5
1μF, 25V Capacitor
180pF, 50V Capacitor
1500μF, 6.3V Aluminum Capacitor
C6
C9-14
C0G
ESR = 44m
1
1
1
R1
R2
R3
47.5
4.75
5.2m
, 1W Resistor
PCB Trace Resistor, see
Equation (3) Applications
1
1
1
R4
R5
D1
Any
Any
Motorola
MBRB1545CT
Fairchild
MMBD4148
Motorola
1N4735A
Fairchild
FDB6030L
Any
Any
Fairchild
FAN5037M
3.48K
2K
15A, 45V Schottky
1
D2
Signal Diode
1
D3
6.2V Zener
1
Q1
30V, 14m
Logic Level MOSFET
Optional
1
1
L1
L2
U1
2.5μH Inductor
4.7μH Inductor
PWM Controller
I
I
SAT
> 8A
> 13A
SAT
Application Information
The FAN5037 contains a precision trimmed zero TC voltage
reference, a constant-on-time architecture controller, a high
current output driver, and a low offset error amp. The
detailed block diagram in Figure 1 shows how the FAN5037
works together with external components to achieve a high-
performance switching power supply.
Switch-Mode Control Loop
The main control loop for the switch-mode converter consists
of a current conditioning amplifier and a voltage conditioning
amplifier. The voltage amplifier compares the voltage from the
internal reference with the converter’s output voltage divided
by an external resistor divider. The current amplifier senses the
current by comparing the voltages at the IFBH and IFBL pins,
which are attached to either side of the current sense resistor.
The signals from the voltage and current amplifiers are
summed together, the result being used to control the off-time
of the oscillator. The current feedback signal is also used as
part of the FAN5037 short-circuit protection.
High Current Output Drivers
The FAN5037 high current output driver (DRV) contains
high speed bipolar power transistors configured in a
push-pull configuration. The output driver is capable of sup-
plying 0.5A of current in less than 100ns. The driver’s power
and ground are separated from the overall chip power and
ground for added switching noise immunity.
Internal Reference
The reference in the FAN5037 is a precision band-gap type
reference. Its temperature coefficient is trimmed to provide a
near zero TC.
Constant-On-Time Oscillator
The FAN5037 switch-mode oscillator is designed as a fixed
on-time, variable off-time oscillator. The constant-on-time
oscillator consists of a comparator, an external capacitor, a
fixed current source, a variable current source, and an analog
switch that selects between two threshold voltages for the
comparator. The external timing capacitor is alternately
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相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN5037_WBA3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5037M | 功能描述:開關變換器、穩壓器與控制器 Switching Controller adustable RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN5037M_Q | 功能描述:開關變換器、穩壓器與控制器 Switching Controller adustable RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN5037MX | 功能描述:DC/DC 開關控制器 Switching Controller adustable RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5038 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Dual Voltage Controller for DSP Power |
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