收藏本站
MAX8834Y/MAX8834Z
Adaptive Step-Up Converters
with 1.5A Flash Driver
GSMB EVENT
GSMB (ACTIVE-HIGH)
INPUT CURRENT
PREDEFINED INPUT CURRENT
LIMIT DURING GSMB
FLED1/FLED2 DECREASED ONE
LSB SINCE I IN > I LIM[3:0]
FLED1/FLED2 INCREASED
ONE LSB SINCE I IN < I LIM[3:0]
FLED2 OUTPUT
CURRENT
FLED1 OUTPUT
CURRENT
FLASH1_CUR
SETTING
TIME
1 μ s AFTER GSMB
ACTIVATED, FLED_ GOES
TO THE MINIMUM SETTING
Figure 10. Input Current Limit During GSMB Event
HC_TMR[1:0]
1 μ s AFTER GSMB
DEACTIVATED, FLED_ GOES
TO THE PREVIOUS SETTING
GSM Blank Function (GSMB)
The GSMB input is provided to allow the flash current to
be momentarily reduced during a GSM transmit to
reduce the peak current drawn from the battery. The
input current limit ensures that the maximum possible
output current is always provided, regardless of the
input voltage and the LED forward voltages.
When a GSMB event is triggered, the FLED1 and
FLED2 current regulators go to the lowest setting to
ensure the current drawn from the battery is quickly
reduced to a safe level. The MAX8834Y/MAX8834Z
16
then start increasing the FLED1 and FLED2 current by
one LSB steps, at a time interval set by HC_TMR[1:0]
(see Table 11). The increasing continues until either the
predefined FLED1/FLED2 current setting is reached or
the input current exceeds the maximum predefined
input current limit during a GSMB event. When the input
current exceeds the predefined input current limit, the
FLED1/FLED2 current is reduced by one LSB. The
MAX8834Y/MAX8834Z continue to adjust the FLED1
and FLED2 up and down depending on the input cur-
rent limit as long as the GSMB event is present. See
Figure 10 for more detailed information.
Maxim Integrated
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MAX8855EVKIT+ KIT EVAL FOR MAX8855
MAX8879ETG+T IC LED DRVR WT/RGB BCKLGT 24TQFN
MAX8901BETA+TCH8 IC LED DRIVER WHITE BCKLGT 8TDFN
MAX8930EWJ+T IC LED DRVR WT/RGB BCKLGT 49WLP
MAXQ2000-KIT EVAL KIT FOR MAXQ2000
MAXQ610-KIT# EVALUATION KIT FOR MAXQ610
MB2146-401-01A KIT STARTER F2MC-8FX 3V
MB2146-401-03A KIT STARTER F2MC-8FX 5V
相关代理商/技术参数
MAX8836ZEREEE+T 功能描述:电流型 PWM 控制器 1.2A PWM Step-Down Converter RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX8836ZEWEEE+ 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX8836ZEWEEE+T 制造商:Maxim Integrated Products 功能描述:
MAX883C/D 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MAX883C/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX883CPA 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MAX883CPA+ 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MAX883CSA 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20