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參數(shù)資料
| 型號(hào)： | MAX1664 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Active-Matrix Liquid Crystal Display AMLCD Supply |
| 中文描述： | 有源點(diǎn)陣液晶顯示器(AMLCD)電源 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 249K |
| 代理商： | MAX1664 |
M
Ac tive-Matrix Liquid Crystal Display
(AMLCD) S upply
8
_______________________________________________________________________________________
_______________Detailed Desc ription
The MAX1664 combines power supply and backplane
drive circuitry for active matrix thin-film-transistor (TFT)
liquid crystal displays (LCD) into one IC. Included are a
pulse-width-modulation (PWM) boost converter, a dual-
output (positive and negative) converter using one
inductor, an LCD backplane driver, and a phase-
locked loop (PLL) to synchronize all three outputs to the
backplane clock.
A high switching frequency (1MHz nominal) and phase-
locked operation allow the use of small, minimum-
height external components while maintaining low
output noise. Output voltages are adjustable to +5.5V
(DC-DC 1) and to +28V and -10V (DC-DC 2). The nega-
tive output voltage can be set to as low as -20V with
additional components.
The frequency ratio between the DC-DC 1 converter
and the backplane clock can be set to 16, 24, or 32.
This flexibility allows high DC-DC converter frequencies
to be used with LCD backplane clock rates ranging
from 20kHz to 72kHz.
S tart-Up
At start-up, both converters remain disabled until V
REF
reaches 90% of its nominal value. V
OUT1
is activated
first. Once V
OUT1
is regulated, V
OUT2-
is enabled.
V
OUT2+
is held at 0 until V
OUT2-
is within 90% of its reg-
ulation target. All three outputs power up in a similar
order when power is applied or when coming out of
shutdown. See the Out-of-Shutdown Sequence photo in
the Typical Operating Characteristics section.
DC-DC 1 Boost Converter
DC-DC 1 uses a current-mode boost PWM architecture
to produce a positive regulated voltage, adjustable
from 3V to 5.5V (but not less than V
IN
). This converter
uses an internal N-channel MOSFET with a maximum
on-resistance of 0.5
. Cycle-by-cycle peak current lim-
iting protects the switch under fault conditions. Upon
start-up, DC-DC 1 is the first converter to be enabled.
BACKPLANE
DRIVER
BPV
SS
BPDRV
BPV
DD
PGND1
FB1
LX1
V
2.8V TO5.5V
V
OUT1
5.5V
SHDN
REF
1.25V
REF
PHASE
DET
VCO
÷
4
÷
2
÷
N
FPLL
BPCLK
PLLC
PGND2
FB2+
LX2N
DC-DC 2
DC-DC 1
LX2P
INP
IN
FB2-
REF
V
OUT2-
-10V
V
OUT2+
IN
REF
GND
GND
RDY
MAX1664
Figure 1. Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1664CUP | Active-Matrix Liquid Crystal Display AMLCD Supply |
| MAX1665S | Lithium-Ion Battery Pack Protector |
| MAX1665V | Lithium-Ion Battery Pack Protector |
| MAX1665X | Lithium-Ion Battery Pack Protector |
| MAX1665XESA | Lithium-Ion Battery Pack Protector |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1664CUP | 制造商:Maxim Integrated Products 功能描述:ACTIVE-MATRIX LIQUID CRYSTAL DISPLAY (AMLCD) - Bulk |
| MAX1664CUP+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX1664EAP+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX1664EUP | 制造商:Maxim Integrated Products 功能描述:ACTIVE-MATRIX LIQUID CRYSTAL DISPLAY (AMLCD) - Bulk 制造商:Rochester Electronics LLC 功能描述: |
| MAX1664EUP+ | 制造商:Maxim Integrated Products 功能描述:ACTIVE-MATRIX LIQUID CRYSTAL DISPLAY (AMLCD) SUPPLY - Rail/Tube |
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