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參數(shù)資料
| 型號： | L6902D |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 89K |
| 代理商： | L6902D |
1/6
L6902D
June 2002
I
UP TO 1A OUTPUT CURRENT
I
OPERATING INPUT VOLTAGE FROM 8V TO 36V
I
PRECISE 3.3V (±2%) REFERENCE VOLTAGE
I
5% OUTPUT CURRENT ACCURACY
I
OUTPUT VOLTAGE ADJUSTABLE FROM
1.235V TO 34V
I
250KHz INTERNALLY FIXED FREQUENCY
I
VOLTAGE FEEDFORWARD
I
ZERO LOAD CURRENT OPERATION
I
ADJUSTABLE CURRENT LIMIT
I
PROTECTION AGAINST FEEDBACK
DISCONNECTION
I
THERMAL SHUTDOWN
APPLICATIONS
I
CHARGERS FOR NiCd, NiMH BATTERIES
AND PREREGULATOR FOR LITHIUM-ION
BATTERIES
I
ADJUSTABLE CURRENT GENERATOR
I
SIMPLE STEP-DOWN CONVERTERS WITH
ADJUSTABLE CURRENT LIMIT
I
BATTERY EQUIPPED SYSTEMS
I
DISTRIBUTED POWER SUPPLY
I
MOBILE PC & SUBNOTEBOOK
DESCRIPTION
The L6902D is a complete and simple step down
switching regulator with adjustable current limit.
Based on a voltage mode structure it integrates a cur-
rent error amplifier to have a constant voltage and con-
stant current control.
By means of an on board current sense resistor and
the availability of the current sense pins (both com-
patible to Vcc and for Cs- compatible with GND too)
a current limit programming is very simple and accu-
rate (±5%). Moreover constant current control can be
used to charge NiMH and NiCd batteries.
The device can be used as a standard DC/DC con-
verter with adjustable current limit (set by using the
external sense resistor).
The internal robust P-Channel DMOS transistor with a
typical of 250m
assures high efficiency and a mini-
mum dropout even at high output current level. The in-
ternal limiting current (latched function) of typical value
of 2.5A protects the device from accidental output short
circuit avoiding dangerous loads damage.
If the temperature of the chip goes higher than a fixed
internal threshold (150°C with 20°C hysteresis), the
power stage is turned off.
SO8
ORDERING NUMBERS: L6902D
L6902D013TR (Tape & Reel)
UP TO 1A SWITCHING REGULATOR WITH
ADJUSTABLE CURRENT LIMIT
TEST AND APPLICATION CIRCUIT
L1 22
μ
H
OUT
C1
10
μ
F
25V
CERAMIC
C3
220pF
C2
22nF
D1
STPS340U
R3
5.1K
C4
100
μ
F
10V
POSCAP
R1
5.6K
R
SENSE
100m
R2
3.3K
V
IN
=8V to 36V
3.3V
V
OUT
=3.3V
V
CC
COMP
VREF
GND
FB
D01IN1306A
8
6
4
2
3
5
1
7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6902D_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:UP TO 1A SWITCHING REGULATOR WITH ADJUSTABLE CURRENT LIMIT |
| L6902D013TR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.235 to 34V Step-Dn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L6902N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| L6910 | 功能描述:DC/DC 開關(guān)控制器 5.0 to 12V Step-Down 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(fēng)格: 封裝 / 箱體:CPAK |
| L6910_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
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