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参数资料
| 型号： | MAX16805ATP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR HIGH BRIGHT 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 400kHz |
| 电源电压： | 5.5 V ~ 40 V |
| 输出电压： | 5.1V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
Thermal Foldback Clamp Level Register
(0x05), MAX16806
Thermal Foldback Clamp Level is a 3-bit register that
sets the minimum percentage of the LED current. Only
the first 3 bits of the data byte program the Thermal
Foldback Clamp Level register. The remaining 5 bits
are ignored. See Table 8. The factory-default register
value is 40%.
EEPROM Content Transfer Register (0x06)
The MAX16805/MAX16806 use the EEPROM Content
Transfer register to transfer data from the EEPROM to
the dynamic registers. A write command issued to this
register transfers data from the EEPROM to the dynam-
ic registers. Data bytes written to the EEPROM Content
Transfer register do not have any significance. At
power-up, the EEPROM content is automatically loaded
into the dynamic registers.
EEPROM Program Enable Register (0x08)
The EEPROM Program Enable register enables the
EEPROM for programming. Write to the EEPROM
Programming Enable register to initiate the EEPROM
programming cycle. Data written to the register does
not have any significance, however, it must be issued
following a write command [(0xFF), (0xCA)] to the
Password register.
Table 8. Thermal Foldback Clamp Level
Applications Information
Programming the LED Current
The MAX16805/MAX16806 use a sense resistor across
CS+ and CS- to set the LED current. The differential
sense amplifier connected across R SENSE provides
ground-loop immunity and low-frequency noise rejec-
tion. The LED current is given by the equation below:
I LED = V SENSE / R SENSE
V SENSE is programmable from 103mV to 198mV
using I 2 C.
Programming EEPROM
Set V IN to 22V before initiating the EEPROM program-
ming. The MAX16805/MAX16806 use dynamic regis-
ters to program the EEPROM. Once the desired
dynamic registers have been updated with a setting,
write the data byte (0xCA) to the Password register
(0xFF). The data byte (0xCA) enables the EEPROM
programming mode. Any other data byte except the
(0xCA) disables the EEPROM programming mode. To
transfer data from dynamic registers to the EEPROM,
write to EEPROM Program Enable register (0x08).
Input Voltage Considerations
For proper operation, the minimum input voltage must
always be:
V IN(MIN) > V SENSE + V FT(MAX) + Δ V DO(MAX)
where V FT(MAX) is the total forward voltage of all series
THERMAL FOLDBACK
CLAMP LEVEL (%)
100
91
83
74
66
57
49
40
BIT 2
0
0
0
0
1
1
1
1
BIT 1
0
0
1
1
0
0
1
1
BIT 0
0
1
0
1
0
1
0
1
HEX
(0x00)
(0x01)
(0x02)
(0x03)
(0x04)
(0x05)
(0x06)
(0x07)
connected LEDs and Δ V DO(MAX) is the maximum drop
output voltage.
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16806ATP+ | 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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 |
| MAX16806ATP+T | 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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 |
| MAX16806EVCMAXQU+ | 功能描述:LED 照明开发工具 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX16806EVKIT+ | 功能描述:LED 照明开发工具 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX16806EVMAXQUSB+ | 功能描述:LED 照明开发工具 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
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