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参数资料
| 型号： | LTC3216EDE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC CHARGE PUMP LED 12-DFN |
| 标准包装： | 91 |
| 应用： | 转换器，高电流 LED |
| 输入电压： | 2.9 V ~ 4.4 V |
| 输出数： | 1 |
| 输出电压： | 多重 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN（4x3） |
| 包装： | 管件 |
LTC3216
APPLICATIONS INFORMATION
P LED
V LED
(5)
= LED LED
P LED
V LED
(7)
= LED LED
P IN
V IN ? 2 ?I LED
2 ? V IN
LEDforwardvoltage.Whenitisoperatingasaswitch,the
ef?ciency is approximated by:
V ?I
P IN V IN ?I IN V IN
since the input current will be very close to the LED current.
At moderate to high output power, the quiescent current
of the LTC3216 is negligible and the expression above is
valid.
Once dropout is detected at the I LED pin, the LTC3216
enables the charge pump in 1.5x mode.
In 1.5x boost mode, the ef?ciency is similar to that of a
linear regulator with an effective input voltage of 1.5 times
the actual input voltage. This is because the input current
for a 1.5x charge pump is approximately 1.5 times the
load current. In an ideal 1.5x charge pump, the power
ef?ciency would be given by:
Similarly, in 2x boost mode, the ef?ciency is similar to
that of a linear regulator with an effective input voltage
of 2 times the actual input voltage. In an ideal 2x charge
pump, the power ef?ciency would be given by:
V ?I
IDEAL
Thermal Management
For higher input voltages and maximum output current,
there can be substantial power dissipation in the LTC3216.
If the junction temperature increases above approximately
150°C, the thermal shutdown circuitry will automatically
deactivate the output. To reduce maximum junction tem-
perature, a good thermal connection to the PC board is
recommended. Connecting the Exposed Pad to a ground
plane and maintaining a solid ground plane under the
device can reduce the thermal resistance of the package
and PC board considerably.
IDEAL
P LED
P IN
=
V LED ?I LED
V IN ? 1.5I LED
V LED
1.5V IN
(6)
3216fc
10
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相关代理商/技术参数 |
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|---|---|
| LTC3217 | 制造商:LINER 制造商全称:Linear Technology 功能描述:600mA Low Noise Multi-LED Camera Light Charge Pump |
| LTC3217EUD | 制造商:Linear Technology 功能描述:LED DRVR 4Segment 3.3V 16-Pin QFN EP |
| LTC3217EUD#PBF | 功能描述:IC LED DRVR FLASH TORCH 16QFN 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 |
| LTC3217EUD#TRPBF | 功能描述:IC LED DRVR FLASH TORCH 16QFN 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 |
| LTC3218 | 制造商:LINER 制造商全称:Linear Technology 功能描述:400mA Single Wire Camera LED Charge Pump |
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