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參數(shù)資料
| 型號： | DS21Q552 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Digital Transmission Interface |
| 英文描述： | DATACOM, PCM TRANSCEIVER, PBGA256 |
| 封裝： | MCM, BGA-256 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 540K |
| 代理商： | DS21Q552 |
Detailed Description
The MAX1562/MAX1562H/MAX1563 family comprises a
programmable current-limited switch designed for USB
and hot-swap applications. The MAX1563 can be pro-
grammed for loads up to 4A, and the MAX1562/
MAX1562H can be programmed for loads up to 3A. The
current limit is programmed using a single resistor. A fault
output notifies the host when the current-limit, short-cir-
cuit, UVLO, or thermal-shutdown threshold is exceeded.
A built-in current limit protects the load and the source
in the event of an overload condition. In addition, a
built-in short-circuit detection circuit pulses the output if
the output is less than 1V (typ), resulting in a lower RMS
output current and reduced power dissipation in the
device. Thermal shutdown protects the device in the
event of a prolonged overload or short-circuit condition.
An internal micropower charge pump generates the
high-side supply needed for driving the gate of the
internal low-RON NMOS switch.
Fault blanking allows the MAX1562/MAX1562H/
MAX1563 family to handle USB loads that may not be
fully compliant with USB specifications. USB loads with
additional bypass capacitance or large startup currents
can be successfully powered while protecting the
upstream power source. If the switch brings up the
load within the blanking period (20ms typ), FAULT is
not asserted. In the event of a current-limit event, cur-
rent through the switch is regulated at the current-limit
target. Below approximately 1V, the short-circuit current
limit is 30% higher than the programmed current limit.
Current-Limit Programming
The MAX1562/MAX1562H/MAX1563 continuous current
limit is set by selecting the value of RISET based on the
MAX1562/MAX1562H/MAX1563
Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
_______________________________________________________________________________________
7
Pin Description
PIN
MAX1562
MAX1562H
SO
MAX1563
(TQFN-EP)
NAME
FUNCTION
1
4
ON (ON)
Switch On/Off Control Input. The active polarity of ON is low for the MAX1562 and high
for the MAX1562H. For the MAX1563, the active polarity of ON is set by SEL.
25
FAULT
Fault Indicator Output. FAULT is an open-drain output that asserts low when the switch
enters a sustained (>20ms) current limit. FAULT goes low immediately during thermal
shutdown or an undervoltage input. Note that during severe short conditions, FAULT
goes low immediately since there is typically also a brief undervoltage transient.
3
6
GND
Ground
4
7
ISET
Current-Limit Input. Connect an external resistor from ISET to GND to set current limit,
where ILIM = 17120 / RISET.
5, 7
9, 12
IN
Power Input for Switch. Connect both IN inputs together and bypass with a 1F
ceramic capacitor to GND. Load conditions might require additional bulk capacitance
to prevent fluctuation on the input source.
6, 8
1, 10
OUT
Power Output for Switch. Bypass OUT to GND with a 4.7F ceramic capacitor. Load
conditions might require additional bulk capacitance. When disabled, OUT goes into
a high-impedance state.
—
2, 8, 11
N.C.
No Connection. Internally unconnected. Leave unconnected or use with other traces
to simplify PC board layout.
—
3
SEL
Polarity Control Input for ON. Drive SEL high for active-high enable. Drive SEL low for
active-low enable.
——
EP
Exposed Pad. Internally connected to GND. Connect to a large ground plane with
multiple vias to manage thermal performance. Not intended as an electrical
connection point.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS21Q552+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad T1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q552B | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS21Q552BN | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q552BN+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad T1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q552N | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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