データシートサーチシステム |
|
ADM1275 データシート(PDF) 9 Page - Analog Devices |
|
ADM1275 データシート(HTML) 9 Page - Analog Devices |
9 / 48 page Data Sheet ADM1275 Rev. D | Page 9 of 48 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 UV OV VCAP TIMER SS ISET VCC SENSE– GATE GND PWRGD FLB VOUT GPO1/ALERT1/CONV ADR LATCH GPO2/ALERT2 SDA SCL SENSE+ ADM1275-1 TOP VIEW (Not to Scale) Figure 3. ADM1275-1 Pin Configuration, QSOP 1 OV 2 VCAP 3 ISET 4 SS 5 TIMER NOTES 1. SOLDER THE EXPOSED PADDLE TO THE BOARD TO IMPROVE THERMAL DISSIPATION. THE EXPOSED PADDLE CAN BE CONNECTED TO GROUND. 13 14 15 12 11 FLB VOUT GND PWRGD SCL ADM1275-1 TOP VIEW (Not to Scale) PIN 1 INDICATOR Figure 4. ADM1275-1 Pin Configuration, LFCSP Table 5. ADM1275-1 Pin Function Descriptions Pin No. QSOP LFCSP Mnemonic Description 1 19 VCC Positive Supply Input Pin. An undervoltage lockout (UVLO) circuit resets the device when a low supply voltage is detected. GATE is held low when the supply is below UVLO. During normal operation, this pin should remain greater than or equal to SENSE+ to ensure that specifications are adhered to. No sequencing is required. 2 20 UV Undervoltage Input Pin. An external resistor divider is used from the supply to this pin to allow an internal comparator to detect whether the supply is under the UV limit. 3 1 OV Overvoltage Input Pin. An external resistor divider is used from the supply to this pin to allow an internal comparator to detect whether the supply is above the OV limit. 4 2 VCAP Internal Regulated Supply. A capacitor with a value of 1 µF or greater should be placed on this pin to maintain good accuracy. This pin can be used as a reference to program the ISET pin voltage. 5 3 ISET This pin allows the current limit threshold to be programmed. The default limit is set when this pin is connected directly to VCAP. To achieve a user-defined sense voltage, the current limit can be adjusted using a resistor divider from VCAP. An external reference can also be used. 6 4 SS Soft Start Pin. A capacitor is used on this pin to set the soft start ramp profile. The voltage on the SS pin controls the current sense voltage limit, which controls the inrush current profile. 7 5 TIMER Timer Pin. An external capacitor, CTIMER, sets an initial timing cycle delay and a fault delay. The GATE pin is pulled low when the voltage on the TIMER pin exceeds the upper threshold. 8 6 LATCH Signals that the device is latching off after an overcurrent fault. The device can be configured for automatic retry after latch-off by connecting this pin directly back to the UV pin. 9 7 ADR PMBus Address Pin. This pin can be tied to GND, tied to VCAP, left floating, or tied low through a resistor to set four different PMBus addresses (see the Device Addressing section). 10 8 GPO1/ALERT1/ CONV General-Purpose Digital Output (GPO1). Alert (ALERT1). This pin can be configured to generate an alert signal when one or more fault or warning conditions are detected. Conversion (CONV). This pin can be used as an input signal to control when a power monitor ADC sampling cycle begins. At power-up, this pin defaults to a high impedance state. There is no internal pull-up on this pin. 11 9 GPO2/ALERT2 General-Purpose Digital Output (GPO2). Alert (ALERT2). This pin can be configured to generate an alert signal when one or more fault or warning conditions are detected. At power-up, this pin indicates the FET health mode by default. There is no internal pull-up on this pin. |
同様の部品番号 - ADM1275 |
|
同様の説明 - ADM1275 |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |