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参数资料
| 型号： | MAX14578EEWC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/23页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER DETECT USB LI+ 12WLP |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.8 V ~ 5.5 V, 3.5 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFBGA，WLCSP |
| 供应商设备封装： | 12-WLP |
| 包装： | 带卷 (TR) |
MAX14578E/MAX14578AE
USB Battery Charger Detectors
Detailed Description
The MAX14578E/MAX14578AE are USB charger detec-
tors compliant with USB Battery Charging Revision 1.1.
The USB charger-detection circuitry detects USB stan-
dard downstream ports (SDPs), USB charging down-
stream ports (CDPs), or dedicated charger ports (DCPs),
and controls an external lithium-ion (Li+) battery charger.
The MAX14578E features I 2 C communication, while the
MAX14578AE features an EN pin and an LDO output pin.
The internal USB switch is compliant to Hi-Speed USB,
full-speed USB, and low-speed USB signals. Both devic-
es feature low on-resistance, low on-resistance flatness,
and very low capacitance.
Input Sources and Routing
The typical Micro/Mini-USB connector has five signal
lines: USB power, two USB signal lines (D-, D+), ID line,
and ground. The USB power on the Micro/Mini-USB con-
nector connects to V B on the MAX14578E/MAX14578AE.
The two USB signal lines, D- and D+, connect to CD- and
CD+.
USB (CD-, CD+)
The MAX14578E/MAX14578AE support Hi-Speed
(480Mbps), full-speed (12Mbps), and low-speed USB
(1.5Mbps) signal levels. The USB channel is bidirectional
and has low 3.3 I (typ) on-resistance and 4.5pF (typ)
on-capacitance. The low on-resistance is stable as the
analog input signals are swept from ground to V SWPOS
for low signal distortion.
LOUT LDO Output (MAX14578AE Only)
The LOUT LDO provides a 5.3V (typ) output, used to
power a USB transceiver. Most USB transceivers are
powered from a 3.3V or higher voltage that is difficult to
derive from a Li+ battery. One solution is to power the
transceivers from the USB V BUS power; however, V BUS
can rise as high as +28V in a fault condition. The LOUT
pin provides a voltage-limited supply that protects the
USB transceiver from these high voltages. When V BUS
rises above 9.0V (typ), the MAX14578AE detects an
overvoltage fault and LOUT goes to 0V. Additionally,
14
LOUT features a 100mA (typ) current limit to protect the
device in the event of a short circuit.
Interrupts
The MAX14578E generates an interrupt for any change in
VBCOMP, and when DBCHG or DCD_T transitions from
0 to 1. The INTEN bit in the CONTROL 1 register (0x01)
enables interrupt output. When INTEN is set to zero, all
interrupts are masked but not cleared. A read to the
INTERRUPT register (0x02) is required to clear interrupts.
Detection Debounce
To avoid multiple interrupts at the insertion of an acces-
sory and for added noise/disturbance protection, a
30ms (typ) debounce timer is present that requires an
inserted or removed state hold for the debounce time
before it sends an interrupt.
Low-Power Modes
The MAX14578E has two I 2 C bits in the CONTROL 1
register (0x01) dedicated to low-power operation:
LOW_POW and CP_ENA.
LOW_POW sets low-power mode. In low-power mode,
the internal oscillator is turned off under the following
conditions: no V BUS , USBSWC = 0, and CP_ENA = 0.
When enabled, all switches are high impedance (note
that no negative rail voltage can be applied).
CP_ENA controls the charge pump required for proper
operation of the analog switches. When set to disable,
no negative rail voltage can be applied. A factory default
sets CP_ENA = 0 automatically.
USB Charger Detection
The MAX14578E includes internal logic to detect if a valid
USB charger is connected. When a valid V BUS voltage is
applied to V B or when CHG_TYP_M in the CONTROL 1
register is set to 1, the MAX14578E/MAX14578AE begin
the charger-type-detection sequence (see Figure 1).
During the charger-type-detection sequence, the CD-
and CD+ switches are open, and once the sequence
completes, the switches return to their previous state.
Figure 2 shows a timing diagram for an example char-
ger-type-detection sequence.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX14578EVKIT# | 制造商:Maxim Integrated Products 功能描述:EVAL KIT MAX14578 (USB CHARGER DETECTION IC) - Boxed Product (Development Kits) |
| MAX14578EWC+ | 制造商:Maxim Integrated Products 功能描述:USB CHARGER DETECTION IC - Rail/Tube |
| MAX14578EWC+T | 功能描述:电池管理 USB Charger Detection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX14579AEETA+T | 功能描述:音频放大器 3.5mm Headset Detect Circuit RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX14579EETA+T | 功能描述:音频放大器 3.5mm Headset Detect Circuit RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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