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参数资料
| 型号： | MAX16826ATJ+C24 |
| 厂商： | Maxim Integrated |
| 文件页数： | 20/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR HB PROGR 32-HQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 恒定电流： | 是 |
| 拓扑： | PWM，SEPIC，升压（升压） |
| 输出数： | 4 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED），RGB，白色 LED |
| 频率： | 100kHz ~ 1MHz |
| 电源电压： | 4.75 V ~ 24 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 125°C |
MAX16826
Programmable, Four-String HB LED Driver with
Output-Voltage Optimization and Fault Detection
Register File Unit
The register file unit is used to store all the control infor-
mation from the SDA line and configure the MAX16826
for different operating conditions. The register file
assignments of the MAX16826 are in Table 2.
Registers 00h to 03h: String Current Programming
These registers are used to program LED string 1 to
LED string 4 current sink values. For each LED string,
CS1–CS4 inputs are connected to the source of the
external current sink FET and internally are connected
to the inverting input of the internal transconductance
amplifier. The noninverting input of this amplifier is con-
nected to the output of an internal DAC programmed
by these registers. As the DAC is incremented, its out-
put voltage decreases from 316mV to 97mV in 1.72mV
steps by the data written in the register 00h to 03h;
thus, the steady-state voltage at CS1–CS4 is given by
the following formula:
V CS1,2,3,4 = 316mV - (1.72mV x RegisterValue[6:0])
For example, if 00h is set to 20h, then the CS1 voltage is:
V CS1 = 316mV - 1.72mV x 32 = 265.3mV
Register 04h: Switching Regulator
Output Programming
Set the switching regulator output voltage by connect-
ing FB to the center of a resistive voltage-divider
between the switching regulator output and GND. V FB
is regulated to a voltage from 876mV to 1.25V (typ) set
by the register 04h through the I 2 C interface.
Table 2. Register File Assignments
The FB reference voltage can be decreased from 1.25V,
its maximum value, by approximately 2.9mV steps. The
steady-state voltage at FB then is regulated to:
V FB = 1.25V - (2.91mV x 04h[6:0])
Registers 05h to 08h: External Current-Sink
FET Drain Voltage ADC Readings
These registers store the drain voltages of the external
current sink FETs. For each register, bits 6–0 are the
conversion data of the ADC outputs. Bit 7 is used to
show if the conversion is terminated by the ADC (indi-
cated by 0) or if there is an internal timeout (indicated
by 1). If the drain voltage exceeds the preset reference
voltage, the corresponding LED string fault bit is assert-
ed. See the Faults and Fault Detection section for more
information on the internal timeout function.
Register 09h: Switching Regulator
Voltage ADC Output
Bits 6-0 of this register store the voltage present at
OVP. This voltage is a scaled down version of the
switching regulator output voltage. Bit 7 is not used.
Register 0Ah: Fault Status Register
This register stores all the external events or fault infor-
mation such as overvoltage and shorted LED string
faults. The fault events are logged only if the system is
not in standby mode and their active states are longer
than one clock cycle. Cycle enable or power to clear the
fault status register. Initiating standby mode using the
I 2 C interface can also be used to clear the fault status
REGISTER
ADDRESS
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R/W
R
USED BIT
RANGE
[6:0]
[6:0]
[6:0]
[6:0]
[6:0]
[7:0]
[7:0]
[7:0]
[7:0]
[6:0]
[5:0]
[0]
[2:0]
RESET
VALUE
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
—
DESCRIPTION
LED String 1 current programming value.
LED String 2 current programming value.
LED String 3 current programming value.
LED String 4 current programming value.
Switching regulator output voltage programming value.
LED String 1 external FET drain voltage ADC output.
LED String 2 external FET drain voltage ADC output.
LED String 3 external FET drain voltage ADC output.
LED String 4 external FET drain voltage ADC output.
OVP voltage, ADC output.
Fault status register.
Device standby command.
Device revision code.
20
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16826BATJ/V+ | 功能描述:LED照明驱动器 Prog 4-String HB 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 |
| MAX16826BATJ/V+T | 功能描述:LED照明驱动器 Prog 4-String HB 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 |
| MAX16826BATJ+ | 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Rail/Tube |
| MAX16826BATJ+T | 制造商:Maxim Integrated Products 功能描述:PROGRAMMABLE, FOUR-STRING HB LED DRIVER WITH OUTPUT-VOLTAGE - Tape and Reel |
| MAX16826EVKIT+ | 制造商:Maxim Integrated Products 功能描述:EVAL KIT FOR THE MAX16826 - Boxed Product (Development Kits) |
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