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参数资料
| 型号： | ISL97635IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHT/RGB BCKLGT 24QFN |
| 标准包装： | 6,000 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 600kHz，1.2MHz |
| 电源电压： | 6 V ~ 24 V |
| 输出电压： | 34.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
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ISL97635
off. This monitoring happens on a cycle by cycle basis in a
self protecting way.
Additionally, the ISL97635 monitors the voltage at the LX
and OVP pins. At start-up, a fixed current is injected out of
the LX pins and into the output capacitor. The device will not
start-up unless the voltage at LX exceeds 1.2V. Furthermore,
should the voltage at LX not rise above this threshold during
any subsequent period where the power FET is not switched
on, it will immediately disable the input protection FET. The
OVP pin is also monitored such that if it rises above and
subsequently falls below 20% of the target OVP level, the
input protection FET will also be switched off.
Over-Temperature Protection (OTP)
The ISL97635 includes two over-temperature thresholds. The
lower threshold is set to +130°C. When this threshold is
reached, any channel which is outputting current at a level
significantly below the regulation target will be treated as “open
circuit” and disabled after a time-out period. This time-out
period is also reduced to 800μs when it is above the lower
threshold. The intention of the lower threshold is to allow bad
channels to be isolated and disabled before they cause enough
power dissipation (as a result of other channels having large
voltages across them) to hit the upper temperature threshold.
The upper threshold is set to +150°C. Each time this is
reached, the boost will stop switching and the output current
sources will be switched off. Once the device has cooled to
approximately +100°C, the device will restart with the DC
LED current level reduced to 77% of the initial setting. If the
dissipation problem persists, subsequent hitting of the limit
will cause identical behavior, with the current reduced in
steps to 53% and finally 30%. Hitting of the upper threshold
will also set the thermal fault bit of the Fault/Status register
0x02. Unless disabled via the EN pin, the device stays in an
active state throughout, allows the external processor to
interrogate the fault condition.
For the extensive fault protection conditions, please refer to
Figure 18 and Table 1 for details.
VIN
LX
VOUT
DRIVER
ILIMIT
IMAX
FAULT
LOGIC
O/P
SHORT
FET
DRIVER
LX
OVP
VSET/2
VSC
IIN0
IIN7
REG
THRM
SHDN
OTP
REF
T2
TEMP
SENSOR
T1
VSET
+
Q0 VSET
+
Q5
-
PWM/OC0/SC0
-
PWM/OC7/SC7
FAULT/
STATUS
SMBUS
CONTROL
REGISTER
LOGIC
DC CURRENT
FIGURE 18. SIMPLIFIED FAULT PROTECTIONS
15
FN6434.2
December 22, 2008
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| ISL97635IRZ-TK | 功能描述:IC LED DRVR WHT/RGB BCKLGT 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| ISL97636AIRZ | 功能描述:LED照明驱动器 6-CH LED DRVR RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| ISL97636AIRZ-T | 功能描述:IC LED DRIVR WHITE BCKLGT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| ISL97636AIRZ-TK | 功能描述:IC LED DRIVR WHITE BCKLGT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| ISL97636IRZ | 功能描述:IC LED DRIVR WHITE BCKLGT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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