参数资料
型号: MAX8798EVKIT+
厂商: Maxim Integrated Products
文件页数: 20/31页
文件大小: 0K
描述: KIT EVAL FOR MAX8798
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
主要目的: 特殊用途 DC/DC,LCD 电源
输出及类型: 4,非隔离
功率 - 输出: 3.56W
输出电压: 8V,3.2V,21V,-13V
电流 - 输出: 300mA,150mA,20mA,20mA
输入电压: 1.8 ~ 6 V
稳压器拓扑结构: 升压
频率 - 开关: 1.2MHz
板类型: 完全填充
已供物品: 板,CD
已用 IC / 零件: MAX8798
Internal-Switch Boost Regulator with
Integrated 3-Channel Scan Driver for TFT LCDs
COLUMN DRIVER
CPV
CKV
SYSTEM
VIDEO
OE
MAX8798
CKVB
PANEL GLASS
TIMING
STV
SCAN DRIVER
STVP
CKV = SCAN CLK ODD
CKVB = SCAN CLK EVEN
STVP = HIGH-VOLTAGE STV
Figure 5. Scan Driver System Diagram
High-Voltage Level-Shifting Scan Driver
The MAX8798 includes a 3-channel high-voltage (60V)
level-shifting scan driver that includes logic functions
necessary to drive row driver functions on the panel
glass (Figure 5). The driver outputs (CKV, CKVB, STVP)
swing between their power-supply rails (GON and
GOFF) according to the input logic levels on the block’s
inputs (STV, CPV, OE, and OECON) and the internal
logic of the block (Tables 3, 4). STV is the vertical sync
signal. CPV is the horizontal sync signal. OE is the output
enable signal. OECON is a timing signal derived from
OE that blanks OE if it stays high too long. These signals
have CMOS input logic levels set by the IN supply volt-
age. CKV and CKVB are complementary scan clock out-
puts. STVP is the output scan start signal. These output
Table 3. STVP Logic
SIGNAL
LOGIC STATE
signals swing from GON to GOFF that have a maximum
range of +45V and -25V. Their 10 Ω (typ) output imped-
ance enables them to swiftly drive capacitive loads. The
STV
OECON
CPV
OE
STVP
H
X
L
L
H
H
X
H
X
Hi-Z
H
X
X
H
Hi-Z
L
X
X
X
L
complementary CKV and CKVB outputs feature power-
saving, charge-sharing inputs (CKVCS, CKVBCS) that
can be used to save power by shorting each output to its
complement during transitions, making a portion of the
transition “lossless.”
X = Don’t care.
Table 4. CKV, CKVB Logic
SIGNAL
LOGIC STATE
STV
OECON
CPV
OE
CKV
CKVB
H
X
L
L
L
H
H
X
H
X
H
L
H
X
X
H
H
L
L
L
L
L
CS
CS
L
L
X
Toggle
Toggle
L
L
X
Toggle
Toggle
L
H
L
X
CS
CS
L
H
X
Toggle
Toggle
X = Don’t care. CS = Charge share state.
20
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