參數(shù)資料
型號(hào)： LTC1840
廠商： Linear Technology Corporation
元件分類： DC/DC變換器
英文描述： RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 05V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83%
中文描述： 雙風(fēng)扇控制器，帶有2線接口
文件頁數(shù)： 1/12頁
文件大?。?/td> 203K
代理商： LTC1840
LTC1840
1
1840f
APPLICATIU
I
Servers
I
Desktop Computers
I
Power Supplies
I
Cooling Systems
DESCRIPTIOU
The LTC
1840 is a fan controller with two 8-bit current
output DACs, two tachometer interfaces, and four general
purpose I/O (GPIO) pins. It operates from a single supply
with a range of 2.7V to 5.75V. A current output DAC is used
to control an external switching regulator, which controls
the fan speed. A current output DAC and tachometer allow
a controller to form a closed control loop on fan velocity.
The GPIO pins can be used as digital inputs or open drain
pull-down outputs.
The part features a simple 2-wire I
2
C and SMBus compat-
ible serial interface that allows communication between
many devices. The interface includes a fault status register
that reflects the state of the part and which can be polled
to find the cause of a fault condition. Other operational
characteristics of the part, such as DAC output currents,
GPIO modes, and tachometer frequency, are also pro-
grammed through the serial interface. Two address pins
provide nine possible device addresses.
The BLAST pin is provided to force the DAC output
currents to program the maximum regulator output
voltages through a single pin and gate the operation of the
serial access timer.
FEATURES
TYPICAL APPLICATIOU
I
Two 8-Bit Current DACs
I
DACs Guaranteed Monotonic
I
Known IC State on Power-Up
I
Serial Interface Watchdog Timer with Disable
I
2-Wire Serial Interface Compatible with I
2
C
TM
and SMBus
I
2 Programmable Fan Tachometer Interfaces
I
4 Programmable General Purpose I/Os
I
Small 16-Pin SSOP Package
I
Single 2.7V to 5.75V Supply Operation
I
Fault Output Signal
I
Status Register
I
Fan Blasting Function
I
Nine Addresses Using Two Programming Lines
Dual Fan Controller
with 2-Wire Interface
1840 TA01
+
C
100pF
C
220pF
R
SENSE1
R
SENSE2
R
FB1A
75k
R
FB1B
28k
C
OUT1
150
μ
F
+
DC
FAN
C
VIN1
22
μ
F
L1 47
μ
H
Si6447DQ
UPS5817
TACH
OUT
3.3V
3.3V
3.3V
3.3V
3.3V
GND
V
CC
+
C
100pF
C
220pF
R
FB2A
75k
R
FB2B
28k
C
OUT2
150
μ
F
+
DC
FAN
C
VIN2
22
μ
F
L2 47
μ
H
Si6447DQ
UPS5817
TACH
OUT
3.3V
12V
12V
SYSTEM
RESET
GPI04
BLAST
IDACOUTA
GPI03
IDACOUTB
TACHB
TACHA
FAULT
SDA
SCL
A0
A1
GPI01
GPI02
LTC1840
R
C1
10k
R
C2
10k
TO
MASTER
NC
NC
130
LED1
130
LED2
ADDRESS = 1110010
(8 OTHERS POSSIBLE)
2-NMB 6820PL-04W-B29-D50 FANS
1.1A NOM AT 12V
10k
10k
10k
+
10
μ
F
0.1
μ
F
RUN/SS
I
TH
V
FB
GND
V
IN
SENSE
PGATE
MODE
LTC1771
RUN/SS
I
TH
V
FB
GND
V
IN
SENSE
PGATE
MODE
LTC1771
Low Parts Count, High Efficiency Dual Fan Control
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
2
C is a trademark of Philips Electronics N.V.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1840CGN 功能描述:IC DUAL FAN CONTROLLER 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無刷（BLDC），3 相 評(píng)估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT
LTC1840CGN#PBF 功能描述:IC CTLR DUAL FAN 2WIRE 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無刷（BLDC），3 相 評(píng)估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT
LTC1840CGN#TR 功能描述:IC DUAL FAN CONTROLLER 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無刷（BLDC），3 相 評(píng)估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT
LTC1840CGN#TRPBF 功能描述:IC DUAL FAN CONTROLLER 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無刷（BLDC），3 相 評(píng)估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT
LTC1840IGN 功能描述:IC DUAL FAN CONTROLLER 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR
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