參數(shù)資料
型號(hào): MAX749
廠商: Maxim Integrated Products, Inc.
元件分類: 通用總線功能
英文描述: Synchronous 4-Bit Up/Down Binary Counters 16-CFP -55 to 125
中文描述: 數(shù)字調(diào)節(jié)LCD偏置電源
文件頁數(shù): 4/12頁
文件大?。?/td> 105K
代理商: MAX749
M
Digitally Adjustable LCD Bias S upply
4
______________________________________________________________________________________
PIN
NAME
FUNCTION
1
V+
+2V to +6V Input Voltage to power the MAX749 and external circuitry. When using an external
P-channel MOSFET, V+ must exceed the MOSFET’s gate threshold voltage.
2
ADJ
Logic Input. When CTRL is high, a rising edge on ADJ increments an internal counter. When CTRL is
low, the counter is reset to mid-scale when ADJ is high. When ADJ is low, the counter does not
change (regardless of activity on CTRL) as long as V+ is applied.
3
CTRL
Logic Input. When CTRL and ADJ are low, the MAX749 is shut down, but the counter is not reset.
When CTRL is low, the counter is reset to mid-scale when ADJ is high. The device is always on when
CTRL is high.
4
FB
Feedback Input for output full-scale voltage selection. -V
OUT(MAX)
= (R
FB
) x (20μA) where R
FB
is
connected from FB to -V
OUT
. The device is in regulation when V
FB
= 0V.
5
GND
Ground
6
DLOW
Output Driver Low. Connect to DHI when using an external P-channel MOSFET. When using an
external PNP transistor, connect a resistor R
BASE
from DLOW to the base of the PNP to set the maxi-
mum base-drive current.
7
DHI
Output Driver High. Connect to the gate of the external P-channel transistor, or to the base of the
external PNP transistor.
8
CS
Current-Sense Input. The external transistor is turned off when current through the sense resistor,
R
SENSE
, brings CS below V+ by 140mV (typ).
OUTPUT
VOLTAGE
LOAD
CURRENT
100mV
AC
/div
10mA/div
0mA
LOAD-TRANSIENT RESPONSE
V
= -15V
TRANSISTOR = ZTX750
50
μ
s/div
V
= -15V
TRANSISTOR = ZTX750
OUTPUT
VOLTAGE
INPUT
VOLTAGE
100mV
AC
/div
1 V/div
0V
LINE-TRANSIENT RESPONSE
V
OUT
= -15V
I
= 5mA
TRANSISTOR = ZTX750
50ms/div
____________________________Typic al Operating Charac teristic s (c ontinued)
(T
A
= +25°C, L = 47μH, unless otherwise noted.)
______________________________________________________________Pin Desc ription
相關(guān)PDF資料
PDF描述
MAX749CSA 4-Bit D-type Registers with 3-State Outputs 16-CDIP -55 to 125
MAX749EPA 4-Bit D-type Registers with 3-State Outputs 20-LCCC -55 to 125
MAX749ESA Digitally Adjustable LCD Bias Supply
MAX7524 Retriggerable Monostable Multivibrators 16-CFP -55 to 125
MAX7624 CMOS 8-Bit Buffered Multiplying DACs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX7490CEE 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX7490CEE+ 功能描述:有源濾波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX7490CEE+T 功能描述:有源濾波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX7490CEE-T 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX7490EEE 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube