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| 型号： | MAX8982MEWO+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 39/73页 |
| 文件大小： | 0K |
| 描述： | IC PWR MGMT ICERA E400 42WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 应用： | 电源，ICERA E400，E450 |
| 输入电压： | 4.1 V ~ 5.5 V |
| 输出数： | 10 |
| 输出电压： | 可编程 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 42-WFBGA，WLCSP |
| 供应商设备封装： | 42-WLP |
| 包装： | 带卷 (TR) |
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MAX8982A/MAX8982P/MAX8982X
Power-Management ICs for
ICERA E400 Platform
POR ON ALL REGISTERS
IN MAX8982A/MAX8982P/
MAX8982X
EN = LOW
OR
IN1_ INVALID
EN = HIGH
AND
IN1_ VALID
THE VALUES IN THE BUCK1DVS1
Figure 9. POR State Diagram
I 2 C ENABLED
PWR _REQ = LOW
AND BUCK1DVS2 REGISTERS
ARE RESET TO THEIR DEFAULTS
WHEN PWR_REQ GOES LOW
Current Regulators (DR1, DR2, DR3)
The ICs have three current regulators that can handle
up to 24mA. The sink current for each current regulator
is set from 3mA to 24mA in 3mA increments through I 2 C.
The default set current is 24mA on each channel.
If a current other than the programmable options is
required, a series resistor can be added to set a current
from 0mA to 24mA (Figure 10). The resistor forces the
current regulator to operate in dropout. Set the resistor
value to (V IN1_ - V F )/I LED , where V F is the forward volt-
age of the LED at the desired current and I LED is the
desired LED current. I LED must be less than the pro-
grammed current (24mA default).
Each current regulator has an embedded flash timer.
The flash time is programmable through the I 2 C inter-
face. This feature allows the system designer to generate
a desired pattern on LED.
Embedded Flash Timer
The flash generator is clocked by the internal 32kHz oscil-
lator. It consists of a counter that wraps at a programmable
value to provide a configurable sequence period (t P ). Up
V IN1 _
DR 1
to four on-pulses can be programmed in this sequence
and the start time for each pulse is programmed indi-
vidually (t 1 –t 4 ). The programmable LED on-time (t ON )
for each pulse is the same for each pulse. The flash tim-
ing is shown in Figure 11. The dimming current can be
changed at any time.
IRQ Description
The ICs use the IRQ to indicate to the baseband pro-
cessor that their status has changed. The IRQ signal is
asserted (pulls low) whenever an interrupt is triggered.
The baseband controller shall read the interrupt register
to find sources of interrupt. IRQ is cleared (high) as soon
as the read sequence of the last IRQ register that con-
tains an active interrupt starts. If an interrupt is captured
during the read sequence, IRQ becomes active (low)
after minimum 24 cycles of the I 2 C clock. An interrupt
can be masked to prevent IRQ from being asserted for
the masked event. A mask bit in the IRQM register imple-
ments masking.
For UVLO interrupt bit, the bit status is only maintained
as long as V BUS is higher than 2.0V in any conditions.
t P
DR 2
DR 3
3-CHANNEL
CURRENT
REGULATOR
(24mA, DEFAULT)
t 1
t ON
t 2
t ON
t ON
t ON
t 3
t 4
Figure 10. Adding Series Resistors to Adjust LED Current
Maxim Integrated
Figure 11. Flash Timing Diagram
39
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8982PEWO+T | 功能描述:PMIC 解决方案 PMIC for ICERA E400/E450 Platform RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8982XEWO+T | 制造商:Maxim Integrated Products 功能描述:POWER MANAGEMENT IC FOR ICERA E400/E450 PLATFORM-MINI CARD - Tape and Reel |
| MAX8986EVKIT+ | 制造商:Maxim Integrated Products 功能描述:PMIC FOR BROADCOM BB ATHENA - Boxed Product (Development Kits) |
| MAX8986EWG+ | 制造商:Maxim Integrated Products 功能描述:POWER MANAGEMENT IC FOR CELL PHONE |
| MAX8986EWG+T | 制造商:Maxim Integrated Products 功能描述:POWER MANAGEMENT IC FOR CELL PHONE,800M 制造商:Maxim Integrated Products 功能描述:PMIC FOR BROADCOM BB ATHENA - Tape and Reel |
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