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| 型号： | MC34827A1EPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 27/57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
OVER-CURRENT PROTECTION (OCP) AND OVER-
TEMPERATURE PROTECTION (OTP)
If the current in the power MOSFET exceeds the specified
OCP limit, the 34827 will operate in CC (Constant Current)
mode, regulating the output current at the OCP limit. If the
OCP condition persists, the IC temperature will rise,
eventually reaching the OTP (over-temperature protection)
limit. The 34827 then turns off the power MOSFET and sets
the OTP_EN interrupt bit in the Interrupt 1 register to inform
the host. The power MOSFET is turned on again when the IC
temperature falls below the OTP falling temperature
threshold, and the OVP_OTP_DIS bit is set. If this case
happens 7 times, the power MOSFET will permanently be
turned off until the accessory is attached again, or the IC is
reset.
The gate driver turns off the power MOSFET with a limited
speed under the OTP case to prevent a high over-shoot
voltage at the VBUS pin.
AUDIO DEVICE TYPE 1 -- AUDIO WITH OR WITHOUT THE REMOTE CONTROL
All Audio Type 1 accessories have the same interface
shown in Figure 21 , either stereo or mono, with or without a
remote control, or with or without a microphone. When a
device, such as the microphone, is not connected in the
accessory, the corresponding pin in the mini-USB connector
will be left floating.
With the normal operation setting of the control bits, when
the accessory is identified as an Audio Type 1 device, the
analog switches SW4, SW7 for SPK_R to DP and SPK_L to
DM, and SW5 for VBUS to MIC are turned on, the power
MOSFET SW8 is turned off to isolate VBUS pin from OUT pin
and the OUT-to-ground FET SW10 is turned on to reduce the
leakage current into the VBUS pin.(see the Figure 20 and
The 34827 supports the remote control key for Audio Type
1 device. If the RAW DATA = 0, the ADC is turned on
periodically to monitor the ID line change caused by the key
pressing. The period is programmed by the device wake-up
bits. If the ADC Result changes, the ADC_Change bit in the
Interrupt register 2 is set to inform the baseband. If the RAW
DATA = 1, a comparator is enabled to monitor the key
pressing.
The timing of the key press when RAW DATA= 1 is shown
in Figure 23 . If a key is pressed for a time less than 20 ms,
the 34827 ignores this key press. If the key is still pressed
after 20 ms, the 34827 starts a timer to count the time during
which the key is kept being pressed. There are three
.
VBUS
conditions according to the press time: Error key press, short
key press and long key press.
1. Error key press: if the key press time is less than T KP ,
Error bit in the Button 2 register and the short key press
bit KP in Interrupt 1 register are set to indicate that an
error happens. The Error bit is reset to ‘0’ when the
Button 2 register is read or next key press happens.
The KP bit is cleared when the Interrupt 1 register is
read.
2. Short key press: if the key press time is between T KP
and T LKP , the KP bit and the corresponding button bit in
Button 1 or Button 2 register are set to inform the
baseband. If the ADC Result is not one of the ADC
values of the 13 buttons, the Unknown bit in the Button
2 register is set. The INTB outputs a low when the key
is released and returns to a high when the interrupt
register is read. The KP bit is cleared when the
Interrupt 1 register is read.
3. Long key press: if the key press time is longer than
T LKP , the long key press bit LKP in the Interrupt 2
register and the corresponding button bit are set to
inform the baseband. If the ADC Result is not one of
the ADC values of the 13 buttons, the Unknown bit in
the Button 2 register is set. When the key is released,
the long key release bit LKR in the Interrupt 2 register
is set to interrupt the baseband again.
AUDIO
ACCESSORY
D+
Audio_R
MIC
D-
Audio_L
ID
R 1
R 2
R 3
R N-1
…...
GND
SEND / END
HOLD
/
R N
Figure 21. Audio Accessory with Remote Control and Microphone
MC34827
Analog Integrated Circuit Device Data
Freescale Semiconductor
27
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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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