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| 型号： | ISL97682IRTZ-T |
| 厂商： | Intersil |
| 文件页数： | 14/17页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR PWM CTRL 2CH 16TQFN |
| 标准包装： | 6,000 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 频率： | 500kHz ~ 650kHz，900kHz ~ 1.1MHz |
| 电源电压： | 4 V ~ 26.5 V |
| 输出电压： | 45V |
| 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： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
ISL97682, ISL97683, ISL97684
VIN
O/P
SHORT
LX
OVP
VOUT
IMAX
I LIMIT
LOGIC
FET
DRIVER
VSC
VIN
VSET/2
REG
THRM
SHDN
T2
REF
TEMP
CH4
OTP
SENSOR
T1
VSET
+
-
Q 1 VSET
+
-
Q 4
PWM1/OC1/SC1
PWM4/OC4/SC4
PHASE SHIFT
AND LOGIC
CONTROL
FIGURE 25. SIMPLIFIED FAULT PROTECTIONS
TABLE 3. PROTECTIONS TABLE
CASE
1
FAILURE MODE
CH1 Short Circuit
DETECTION MODE
Over-Temperature
FAILED CHANNEL ACTION
CH1 ON and burns power
GOOD CHANNELS ACTION
CH2 through CH4 Normal
V OUT REGULATED
BY
Highest VF of CH2
Protection limit (OTP) not
triggered and CH1 < 4.4V
through CH4
2
CH1 Short Circuit
OTP triggered but VCH1 < All channels switched off until power-cycled.
4.4V
Highest VF of CH2
through CH4
3
CH1 Short Circuit
OTP not triggered but
CH1 faults out after 6 PWM cycle
CH2 through CH4 Normal
Highest VF of CH2
CH1 > 4.4V
(7-18 in direct PWM) time-out
through CH4
4
CH1 Open Circuit
with infinite
OTP not triggered and
CH1 < 4.4V
V OUT will ramp to OVP. CH1 will
time-out after 6 PWM cycles (7-18
CH2 through CH4 Normal
Highest VF of CH2
through CH4
resistance
in direct PWM) and switch off. V OUT
will drop to normal level.
5
CH1 LED Open
Circuit but has
paralleled Zener
OTP not triggered and
CH1 < 4.4V
CH1 remains ON and has highest
VF, thus V OUT increases
CH2 through CH4 ON, Q2 through VF of CH1
Q4 burn power
6
CH1 LED Open
OTP triggered but CH1 <
CH1 goes off
Same as CH1
VF of CH1
Circuit but has
paralleled Zener
4.4V
7
CH1 LED Open
Circuit but has
paralleled Zener
OTP not triggered but
CHx > 4.4V
CH1 remains ON and has highest
VF, thus V OUT increases.
V OUT increases then CH-X
switches OFF after 6 PWM cycles.
This is an unwanted shut off and
VF of CH1
can be prevented by setting OVP
at an appropriate level.
8
Channel-to-Channel
Δ VF too high
OTP triggered but CHx <
4.4V
All channels switched off until chip cooled
Highest VF of CH1
through CH4
9
Output LED stack
voltage too high
V OUT > V OVP
14
Driven with normal current. Any channel that has insufficient headroom Highest VF of CH1
will fault out after 6 PWM cycle (7-18 in direct PWM) time-out. through CH4
FN7689.1
May 16, 2012
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| ISL97682IRTZ-TK | 功能描述:IC LED DVR PWM CTRL 2CH 16TQFN 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 |
| ISL97682IRTZ-TR5509 | 功能描述:LED照明驱动器 1 Channel LED Driver, 16LD TQFN 3X3, T&R 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 |
| ISL97683IRTZ | 功能描述:IC LED DVR PWM CTRL 3CH 16TQFN 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 |
| ISL97683IRTZEVALZ | 功能描述:EVAL BOARD LED DRIVER 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 |
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