参数资料
型号: MAX17100ETM+T
厂商: Maxim Integrated Products
文件页数: 21/35页
文件大小: 0K
描述: IC REG BOOST INT-SWITCH 48-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
应用: LCD 电视机/监控器
电源电压: 2.5 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-WFQFN 裸露焊盘
供应商设备封装: 48-TQFN-EP(6x6)
包装: 带卷 (TR)
Internal-Switch Boost Regulator with Integrated Scan
Driver, VCOM Calibrator, and Op Amp for TFT LCDs
Short-Circuit Current Limit
The operational amplifiers limit short-circuit current to
approximately ±200mA if the output is directly shorted to
SUP or to OGND. If the short-circuit condition persists, the
junction temperature of the IC rises until it reaches the
thermal-shutdown threshold (+160°C typ). Once the junc-
tion temperature reaches the thermal-shutdown threshold,
an internal thermal sensor immediately sets the thermal
fault latch, shutting off all the IC’s outputs. The device
remains inactive until the input voltage is cycled.
Undervoltage Lockout (UVLO)
The UVLO circuit compares the input voltage at IN with
the UVLO threshold (2.25V typ) to ensure the input volt-
140mV (typ) hysteresis prevents supply transients from
causing a restart. Once the input voltage exceeds the
UVLO rising threshold, startup procedure begins. When
the input voltage falls below the UVLO falling threshold,
the controller turns off the main step-up regulator and
the linear regulators, pulls GATE high to turn off the
external series p-channel MOSFET and disables the
switch control block. The operational-amplifier outputs
become high impedance at this time.
Reference Voltage (REF)
The reference output is nominally 1.25V and can source
at least 50μA. Bypass REF with a 0.22μF ceramic
capacitor connected between REF and AGND.
age is high enough for reliable operation. The wider
V IN
GATE
V MAIN
V REF
V GHON
V GOFF
14ms
V TGS
V REF
V GHC_
V GHC_ IS UNCONNECTED
V GHC_ DEPENDS ON YV1C_
INPUT
VOLTAGE OK
SOFT-START
BEGINS
SOFT-START
ENDS
Figure 7. Power-Up Sequence
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