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參數(shù)資料
| 型號： | MAX749CPA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Digitally Adjustable LCD Bias Supply |
| 中文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 105K |
| 代理商： | MAX749CPA |
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX749CPA+ | 功能描述:顯示驅(qū)動器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749CPA+T | 制造商:Maxim Integrated Products 功能描述: |
| MAX749CSA | 功能描述:顯示驅(qū)動器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749CSA+ | 功能描述:其他電源管理 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| MAX749CSA+T | 功能描述:顯示驅(qū)動器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
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