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| 型号： | ISL97671AIRZ |
| 厂商： | Intersil |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR PWM CTRL 6CH 20QFN |
| 标准包装： | 75 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | RGB |
| 频率： | 475kHz ~ 640kHz，970kHz ~ 1.31MHz |
| 电源电压： | 4.5 V ~ 26.5 V |
| 输出电压： | 45V |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
| 工作温度： | -40°C ~ 85°C |
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ISL97671A
TABLE 2. PROTECTIONS TABLE
CASE
1
FAILURE MODE
CHx Short Circuit
DETECTION MODE
Upper Over-Temperature
FAILED CHANNEL ACTION
CHx ON and burns power.
GOOD CHANNELS ACTION
Remaining channels normal
V OUT REGULATED
BY
Highest VF of all
Protection limit (OTP) not
triggered and CHx < 7.5V
channels
2
CHx Short Circuit
Upper OTP triggered but
All channels go off until chip cooled
Same as CHx
Highest VF of
CHx < 7.5V
and then comes back on with
current reduced to 76%. Subsequent
OTP triggers will reduce I OUT further.
remaining
channels
3
CHx Short Circuit
Upper OTP not triggered
CHx disabled after 6 PWM cycle
Remaining channels normal
Highest VF of
but CHx > 7.5V
time-outs.
remaining
channels
4
5
CHx Open Circuit with Upper OTP not triggered
infinite resistance and CHx < 7.5V
CHx LED Open Circuit Upper OTP not triggered
V OUT will ramp to OVP. CHx will time- Remaining channels normal
out after 6 PWM cycles and switch
off. V OUT will drop to normal level.
CHx remains ON and has highest VF, Remaining channels ON,
Highest VF of
remaining
channels
VF of CHX
but has paralleled
Zener
and CHx < 7.5V
thus V OUT increases.
remaining channel FETs burn
power
6
CHx LED Open Circuit Upper OTP triggered but
CHx < 7.5V
but has paralleled
All channels go off until chip cooled
and then comes back on with
Same as CHx
VF of CHx
Zener
current reduced to 76%. Subsequent
OTP triggers will reduce I OUT further
7
CHx LED Open Circuit Upper OTP not triggered
but has paralleled but CHx > 7.5V
Zener
CHx remains ON and has highest VF, V OUT increases, then CH-X
thus V OUT increases. switches OFF after 6 PWM cycles.
This is an unwanted shut off and
VF of CHx
can be prevented by setting OVP
at an appropriate level.
8
Channel-to-Channel
Δ VF too high
Lower OTP triggered but
CHx < 7.5V
Any channel below the target current will fault out after 6 PWM cycles.
Remaining channels driven with normal current.
Highest VF of
remaining
channels
9
Channel-to-Channel
Δ VF too high
Upper OTP triggered but
CHx < 7.5V
All channels go off until chip cools and then come back on with current
reduced to 76%. Subsequent OTP triggers will reduce I OUT further
Boost switch OFF
10
Output LED stack
voltage too high
V OUT > VOVP
Any channel that is below the target current will time-out after 6 PWM Highest VF of
cycles, and V OUT will return to the normal regulation voltage required for remaining
other channels. channels
11
V OUT /LX shorted to
GND at start-up or
V OUT shorted in
operation
LX current and timing are The chip is permanently shutdown 31ms after power-up if V OUT /Lx is
monitored. shorted to GND.
OVP pins monitored for
excursions below 20% of
OVP threshold.
16
FN7709.3
November 30, 2012
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| ISL97671AIRZ-T | 功能描述:IC LED DRVR 6-CH BACKLIGHT 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
| ISL97671AIRZ-TK | 功能描述:IC LED DVR PWM CTRL 6CH 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
| ISL97671IRZ | 制造商:Intersil Corporation 功能描述:6-CH LED DRIVER WITH I2C CONTROL - Rail/Tube |
| ISL97671IRZ-EVALZ | 功能描述:BOARD EVALUATION FOR ISL97671 RoHS:是 类别:编程器，开发系统 >> 评估板 - LED 驱动器 系列:- 标准包装:1 系列:PowerWise® 电流 - 输出 / 通道:20mA 输出及类型:1，非隔离 输出电压:17V 特点:可调光 输入电压:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相关产品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
| ISL97671IRZ-T | 制造商:Intersil Corporation 功能描述:6-CH LED DRIVER WITH I2C CONTROL - Tape and Reel |
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