ADM1177: Hot Swap Controller and Digital Power Monitor with Soft Start Pin
The ADM1177 is an integrated hot swap controller that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C ...More
ADM1177: Hot Swap Controller and Digital Power Monitor with Soft Start Pin
Product Description
The ADM1177 is an integrated hot swap controller that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C interface.
An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC pin and the SENSE pin.
The ADM1177 limits the current through this resistor by control-ling the gate voltage of an external N-channel FET in the power path, via the GATE pin. The sense voltage (and, therefore, the inrush current) is kept below a preset maximum.
The ADM1177 protects the external FET by limiting the time that it spends with maximum current running through it. This current limit period is set by the choice of capacitor attached to the TIMER pin. Additionally, the device provides protection from overcurrent events that may occur once the hot swap event is complete. In the case of a short-circuit event, the current in the sense resistor exceeds an overcurrent trip threshold, and the FET is switched off immediately by pulling down the GATE pin.
A soft start (SS) pin is also included. This gives the user control over the reference on the current sense amplifier. An internal current source charges a capacitor on this pin at startup, allowing the user to set the profile of the initial current ramp. A voltage can also be driven on this pin to alter the reference.
A 12-bit ADC can measure the current seen in the sense resistor, as well as the supply voltage on the VCC pin. An industry-standard I2C interface allows a controller to read current and voltage data from the ADC. Measurements can be initiated by an I2C command. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to four unique I2C addresses can be created, depending on the way the ADR pin is connected.
The ADM1177 is packaged in a 10-lead MSOP.
Applications
Data Sheet, Rev. B, 3/08
Features
- Allows safe board insertion and removal from a live backplane
- Controls supply voltages from 3.15 V to 16.5 V
- Precision current sense amplifier
- Precision voltage input
- 12-bit ADC for current and voltage readback
- Charge pumped gate drive for external N-channel FET
- Active high ON pin
- 10-lead MSOP
- Adjustable analog current limit with circuit breaker
- ±3% accurate hot swap current limit level
- Fast response limits peak fault current
- Automatic retry or latch-off on current fault
- Programmable hot swap timing via TIMER pin
- Soft start pin for reference adjustment and programming of initial current ramp rate
- I2C fast mode-compliant interface (400 kHz maximum)
Diagrams
- Enlarge
- Другие диаграммы
- Обозначения и трафареты для печатной платы
Functional Block Diagram for ADM1177
Hot Swap Controller and Digital Power Monitor with Soft Start Pin
Другие диаграммы для ADM1177
Hot Swap Controller and Digital Power Monitor with Soft Start Pin
ADM1177 Pin Configuration
Functional Block Diagram for ADM1177
| Part# | Operating Range(V) | UV & OV Detection | Digital V & I Readback | Other Inputs | Other Outputs | Package | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|
| ADM1170 | 1.6 to 16.5 | ON pin (UV) | - | - | - | 8 ld TSOT | $2.13 |
| ADM1171 | 2.7 to 16.5 | ON pin (UV) | - | - | CS_OUT | 8 ld TSOT | $2.23 |
| ADM1172 | 2.7 to 16.5 | ON pin (UV) | - | PFI | PFO | 8 ld TSOT | $2.02 |
| ADM1175 | 3.15 to 16.5 | ON pin (UV), ONB pin (OV) | I2C Interface, w/ 4 Addreses | CONV Pin | - | 10-Lead MSOP | $2.53 |
| ADM1176 | 3.15 to 16.5 | ON pin (UV) | I2C Interface, w/ 16 Addresses | - | - | 10-Lead MSOP | $2.53 |
| ADM1177 | 3.15 to 16.5 | ON pin (UV) | I2C Interface, w/ 4 Addreses | - | - | 10-Lead MSOP | $2.53 |
| ADM1178 | 3.15 to 16.5 | ON pin (UV) | I2C Interface, w/ 4 Addreses | - | ALERTB | 10-Lead MSOP | $2.73 |
| ADM4210 | 2.7 to 16.5 | ON pin (UV) | - | - | - | 6-ld TSOT | $3.02 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.
ADM1177 Model Options
| Модели | Статус | Корпуса | Pins | Температурный диапазон |
Цена* (1000 pcs.) |
Production** Availability |
ROHS Compliant | Samples Cart | Purchase Cart |
|---|---|---|---|---|---|---|---|---|---|
| ADM1177-1ARMZ-R7 | Prodn | 10 ld MSOP | 10 | Ind | $ 2,53 | 12/05/2008 |
Y
Material Declaration |
Add To Cart | Add To Cart |
| ADM1177-2ARMZ-R7 | Prodn | 10 ld MSOP | 10 | Ind | $ 2,53 | 12/05/2008 |
Y
Material Declaration |
Add To Cart | Add To Cart |
| EVAL-ADM1177EBZ | Prodn | EVALUATION BOARDS | - | TBD | $ 151,80 | 12/05/2008 | Y | Обратная связь | Add To Cart |
Help
Close- "Pre-Release": модель микросхемы еще не запущена в серийное производство, однако можно получить образцы.
- Производство: модель производится, доступна для покупки и заказа образцов.
- Завершение продаж: запланировано снятие модели микросхемы с производства, но в течение некоторого ограниченного времени покупка еще возможна.
- Снято с производства: Микросхема снята с производства и не доступна для приобретения. Другие варианты, указанные в таблице, все еще производятся (если их статус любой, кроме "снято с производства")
Для более подробного описания корпуса и материалов - см. Package Site
- Коммерческое исполнение: 0…70°С
- Военное исполнение: от -55 до +125 градусов по Цельсию
- Индустриальное исполнение: диапазоны рабочих температур могут быть разные у разных моделей. См. техническое описание (datasheet)
- Automotive: -40 to +125 °С
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.
*Приведенные цены действительны в США и указаны только для примерного бюджетного рассчета. Цены указаны в долларах США (за штуку в указанном размере партии) и могут быть изменены. Цены в других регионах могут отличаться в зависимости от местных пошлин, налогов, сборов и курсов валют. Для уточнения стоимости обращайтесь в местные офисы продаж Analog Devices, или к официальным дистрибьюторам. Цены на оценочные платы и наборы указаны за штуку независимо от количества.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.