参数资料
型号: ISL97693IRTZ
厂商: Intersil
文件页数: 25/28页
文件大小: 0K
描述: IC LED DRVR BACKLIGHT 16TQFN
标准包装: 100
拓扑: PWM,升压(升压)
输出数: 6
内部驱动器:
类型 - 主要: 背光
频率: 400kHz ~ 1.5MHz
电源电压: 2.5 V ~ 5.5 V
输出电压: 26V
安装类型: 表面贴装
封装/外壳: 16-WFQFN 裸露焊盘
供应商设备封装: 16-TQFN(3x3)
包装: 管件
工作温度: -40°C ~ 85°C
ISL97692, ISL97693, ISL97694A
VIN
LX
VOUT
DRIVER
IMAX
ILIMIT
FAULT
LOGIC
O/P
SHORT
FET
DRIVER
LX
OVP
VSC
CH1
FAULT FLAG
CHx
THRM
SHDN
OTP
REF
T2
TEMP
SENSOR
T1
FAULT
DETECT
DC1
Q1
DC2
Qx
LOGIC
PWM
PWM/OC1/SC1
PWM/OCx/SCx
GENERATOR
FIGURE 35. ISL97692/3/4A SIMPLIFIED FAULT PROTECTIONS
TABLE 7. ISL97692/3/4A PROTECTIONS TABLE
CASE
1
FAILURE MODE
CH1 Short Circuit
DETECTION MODE
Upper
Over-Temperature
FAILED CHANNEL ACTION
CH1 ON and burns power.
OTHER CHANNELS ACTION
Normal Operation
V OUT
REGULATED BY
Highest LED string V F
of other channels
Protection limit (OTP)
not triggered and
CH1 < 8V
2
CH1 Short Circuit
OTP triggered
Boost converter and channels are shut down until V IN is cycled
-
3
CH1 Short Circuit
OTP not triggered,
CH1 > 8V
CH1 disabled after 6 PWM cycle
time-out
Normal Operation
Highest LED string V F
of other channels
4
CH1 Open Circuit with OTP not triggered,
infinite resistance CH1 < 8V
V OUT will ramp to OVP. CH1 will
time-out after 6 PWM cycles and
Normal Operation
Highest LED string V F
of other channels
switch off. V OUT will then reduce to
normal level
5
Output LED stack
voltage too high
V OUT = V OVP
25
Any channel that is below the target current will time-out after 6 PWM Highest LED string V F
cycles while V OUT is regulated at V OVP , and V OUT will then return to the of channels above
normal regulation voltage required for other channels target current
FN7839.4
December 20, 2012
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