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参数资料
| 型号： | MAX8798EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/31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 |
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Internal-Switch Boost Regulator with
Integrated 3-Channel Scan Driver for TFT LCDs
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
NAME
CKV
CKVCS
CKVBCS
CKVB
STVP
STV
OECON
OE
CPV
GND
DISH
V DD
WPN
SCLS
SCL
SDA
WPP
SET
VL
FUNCTION
High-Voltage, Gate-Pulse Output. When enabled, CKV toggles between its high state (connected to
GON) and its low state (connected to GOFF) on each falling edge of the CPV input. Further, CKV is high
impedance whenever CPV and OE are both low or whenever CPV is low and OECON is high.
CKV Charge-Sharing Connection. CKVCS connects to CKV whenever CKV is high impedance to allow
connection to CKVB, sharing charge between the capacitive loads on these two outputs.
CKVB Charge-Sharing Connection. CKVBCS connects to CKVB whenever CKVB is high impedance to
allow connection to CKV, sharing charge between the capacitive loads on these two outputs.
High-Voltage, Gate-Pulse Output. CKVB is the inverse of CKV during active states and is high
impedance whenever CKV is high impedance.
High-Voltage, Start-Pulse Output. STVP is low (connected to GOFF) whenever STV is low and is high
(connected to GON) only when STV is high and CPV and OE are both low. When STV is high and either
CPV or OE is high, STVP is high impedance.
Vertical Sync Input. The rising edge of STV begins a frame of data. The STV input is used to generate the
high-voltage STVP output.
Active-Low, Output-Enable Timing Input. OECON is driven by an RC-filtered version of the OE input signal. If
OE remains high long enough for the resistor to charge the capacitor up to the OECON threshold, the OE
signal is masked until OE goes low and the capacitor is discharged below the threshold through the resistor.
Active-High, Gate-Pulse Output Enable. CKV and CKVB leave the high-impedance charge-sharing state
on the rising edge of OE.
Vertical Clock-Pulse Input. CPV controls the timing of the CKV and CKVB outputs that change state (by
first sharing charge) on its falling edge.
Logic Ground
GOFF Discharge Input. Pulling DISH below ground activates an internal connection between GOFF and
GND, rapidly discharging the GOFF supply. Typically, DISH is capacitively connected to IN, so that
when V IN falls GOFF is discharged.
Supply Input. Logic supply input for the VCOM calibrator. Bypass to GND through a minimum 0.1 μF
capacitor.
Active-Low, Write-Protect Input. When WPN is low, I 2 C commands are ignored and the VCOM calibrator
settings cannot be modified.
Alternate I 2 C-Compatible Clock Input. When WPN is high, SCLS connects to SCL to drive SCL from an
alternate clock source.
I 2 C-Compatible Clock Input and Output
I 2 C-Compatible Serial Bidirectional Data Line
Write-Protect Output. WPP is the inverse of WPN. It can be used to control active-high, write-protect
inputs on other devices.
Full-Scale, Sink-Current Adjustment Input. Connect a resistor, R SET , from SET to GND to set the full-
scale adjustable sink current that is V BOOST / (20 x R SET ). I OUT is equal to the current through R SET .
3.3V On-Chip Regulator Output. This regulator powers internal analog circuitry for the step-up regulator,
op amp, and VCOM calibrator. External loads up to 10mA can be powered. Bypass VL to GND with a
0.22 μF or greater ceramic capacitor.
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