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参数资料
| 型号： | LTC3202EMS |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 10-MSOP |
| 标准包装： | 50 |
| 拓扑： | PWM，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： | 1.5MHz |
| 电源电压： | 2.7 V ~ 4.5 V |
| 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-MSOP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
LTC3202
OPERATIO
Layout Considerations
Due to its high switching frequency and the transient
currents produced by the LTC3202, careful board layout is
necessary. A true ground plane and short connections to
all capacitors will improve performance and ensure proper
regulation under all conditions. Figure 6 shows the recom-
mended layout configurations.
The flying capacitor pins C1 + , C2 + , C1 – and C2 – will have
very high edge rate waveforms. The large dv/dt on these
pins can couple energy capacitively to adjacent printed
circuit board runs. Magnetic fields can also be generated
if the flying capacitors are not close to the LTC3202 (i.e.
the loop area is large). To decouple capacitive energy
transfer, a Faraday shield may be used. This is a grounded
PC trace between the sensitive node and the LTC3202
pins. For a high quality AC ground it should be returned to
a solid ground plane that extends all the way to the
LTC3202.
Thermal Management
For higher input voltages and maximum output current
there can be substantial power dissipation in the LTC3202.
If the junction temperature increases above approxi-
mately 160 ° C the thermal shutdown circuitry will auto-
matically deactivate the output. To reduce the maximum
junction temperature, a good thermal connection to the
PC board is recommended. Connecting the GND pin (Pin
5 and Pin 11 on the DFN package) 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.
Brightness Control Using Pulse Width Modulation
An alternative approach to dimming is to use pulse width
modulation rather than the internal digital to analog con-
verter. By connecting both the D0 and D1 pins to a PWM
signal, continuous brightness control can be achieved.
Frequencies from 100Hz to 500Hz are acceptable with a
1 μ F to 4.7 μ F output capacitor.
V OUT
GND
V IN
V D0, D1
10
1
D0
D1
LTC3202
t
D1
D0
3202 F07
Figure 7. Alternative Brightness Control
V OUT
V IN
GND
3202 F06
Figure 6. Recommended Layouts
3202fa
10
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相关代理商/技术参数 |
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| LTC3202EMS#PBF | 功能描述:IC LED DRVR WHITE BCKLGT 10-MSOP 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 |
| LTC3202EMS#TR | 功能描述:IC LED DRVR WHITE BCKLGT 10-MSOP RoHS:否 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 |
| LTC3202EMS#TRPBF | 功能描述:IC LED DRVR WHITE BCKLGT 10-MSOP 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 |
| LTC3203 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps |
| LTC3203-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps |
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