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参数资料
| 型号： | MC34827A1EPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 32/57页 |
| 文件大小： | 0K |
| 描述： | IC USB POWER MANAGER 20-QFN |
| 标准包装： | 1 |
| 应用： | OR 控制器，UART/USB 数据，音频管理 |
| 电流 - 电源： | 9µA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-UFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（3x3） |
| 包装： | 标准包装 |
| 其它名称： | MC34827A1EPR2DKR |
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FUNCTIONAL DEVICE OPERATION
OPERATION AFTER IDENTIFICATION
USB HOST (PC OR HUB)
When the attached accessory is a USB host or hub, the ID
pin is floating. With the normal operation setting of the control
bits, both the D+ to DP and the D- to DM switches are
switched on (see Figure 28 ),the power MOSFET is turned on
to allow the charger to charge the battery and the ISET
outputs high-impedance to limit the charging current to a
lower level.
When INT_MASK = 0, the switching action of D+ to DP
and the D- to DM switches are controlled by the WAIT bit. If
WAIT = 1, the signal switches will be turned on after a WAIT
time since the INTB outputs low voltage as for other type
accessory. If WAIT = 0, the signal switches won’t be turned
on until the WAIT bit is set to ‘1’ by I 2 C. When INT_MASK =
1, no matter the WAIT is set to ‘0’ or ‘1’, the signal switches
are turned on once the USB host is identified.
After the D+ to DP and the D- to DM switches are turned
on, the baseband can pull the D+ signal to high to start the
USB attaching sequence.
The detachment is detected by the falling edge of the
VBUS_DET signal. When the VBUS_DET falls, the Detach
bit is set to inform the baseband. Then the 34827 enters the
Standby mode.
Baseband
VDD
Charger
OUT
USB
Cable
USB
VBUS
Det
VBUS
5V
Host
USB Xcvr
D+
D-
ADC
ID Det
DP
DM
ID
GND
D+
D-
ID
GND
SHLD
Figure 28. Operation of the USB Cable
USB CHARGER OR DEDICATED CHARGER
When the attached accessory is a USB charger or
dedicated charger, the 34827 turns on the power MOSFET to
allow the charger to start and the ISET outputs low-
impedance to allow a higher charge current. With the normal
operation setting of the control bits, the D+ and D- switches
are turned on for the USB charger but not for the dedicated
The VBUS detector is used to monitor the detachment of
the charger. The falling edge of VBUS_DET is an indication
of the charger detachment. Both unplugging the mini-USB
connector and unplugging the ac side lead to the same
detachment conclusion. The detach bit is set to inform the
host. Then the 34827 enters the Standby mode.
charger.
5-WIRE CHARGER (TYPE 1 OR TYPE 2) OR A/V CHARGER
When the attached accessory is a 5-Wire Charger or A/V
Charger, the 34827 turns on the power MOSFET to allow the
charger to start and the ISET outputs high-impedance.
The VBUS detector is used to monitor the detachment of
of the charger detachment. Both unplugging the mini-USB
connector and unplugging the ac side lead to the same
detachment conclusion. The detach bit is set to inform the
host. Then the 34827 enters the Standby mode.
the charger. The falling edge of VBUS_DET is an indication
UNKNOWN ACCESSORY
When an unknown accessory is attached, either the
ID_FLOAT bit is cleared or the VBUS_DET bit is set to ‘1’.
Only the Unknown_Atta bit is set to interrupt the baseband.
The attach bit is not set to distinguish the unknown accessory
from the known accessory. No other actions are taken.
If an unknown powered accessory is attached, the power
MOSFET is turned on during the identification process and
MC34827
Analog Integrated Circuit Device Data
32
Freescale Semiconductor
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相关代理商/技术参数 |
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| MC34827A2EPR2 | 功能描述:USB 接口集成电路 MINI USB IC RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| MC34829 | 制造商:SPC Multicomp 功能描述:CONNECTOR FPC SMD 0.5MM 20WAY |
| MC3482BL | 制造商:Motorola Inc 功能描述: |
| MC34831 | 制造商:SPC Multicomp 功能描述:HEADER VERTICAL SMT 7WAY 制造商:SPC Multicomp 功能描述:HEADER, VERTICAL, SMT, 7WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONNECTOR HEADER 7POS, 1.25MM; Connector Type:Wire to Board; Series:1251S; Contact Termination:Surface Mount Vertical; Gender:Header; No. of Contacts:7; No. of Rows:1; Pitch Spacing:1.25mm; Contact Plating:Tin ;RoHS Compliant: Yes |
| MC34833 | 制造商:SPC Multicomp 功能描述:HEADER VERTICAL SMT 11WAY |
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