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ADP1051 датащи(PDF) 9 Page - Analog Devices |
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ADP1051 датащи(HTML) 9 Page - Analog Devices |
9 / 17 page Preliminary Technical Data ADP1051 Rev. PrA | Page 9 of 17 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 VS- Inverting Voltage Sense Input. This is the connection for the ground line of the power rail. There should be a low ohmic connection to AGND. It is recommended that the resistor divider on this input have a tolerance specification of 0.5% or better to allow for trimming. 2 VS+ Noninverting Voltage Sense Input. This signal is referred to VS−. It is recommended that the resistor divider on this input have a tolerance specification of 0.5% or better to allow for trimming. 3 CS2- Inverting Differential Current Sense Input. Nominal voltage at this pin should be 1.15 V for best operation. When using high-side current sensing in a 12 V application, place a 5.62 kΩ resistor between the sense resistor and this pin. When using low-side current sensing, place a 5 kΩ resistor between the sense resistor and this pin. When using high-side current sensing, use the formula R = (VCOMMONMODE – 1.15)/1.9mA. A 0.1% resistor must be used to connect this circuit. 4 CS2+ Noninverting Differential Current Sense Input. Nominal voltage at this pin should be 1.15 V for best operation. When using high-side current sensing in a 12 V application, place a 5.62 kΩ resistor between the sense resistor and this pin. When using low-side current sensing, place a 5 kΩ resistor between the sense resistor and this pin. When using high-side current sensing, use the formula R = (VCOMMONMODE – 1.15)/1.9 mA. A 0.1% resistor must be used to connect this circuit. 5 VF Three optional functions can be implemented with this pin: feed forward, primary side input voltage sensing and input voltage lost detect. It is connected upstream of the output inductor through a resistor divider network. The nominal voltage at this pin should be 1V. This signal is referred to AGND 6 CS1 Primary Side Current Sense Input. This pin is connected to the primary side current sensing ADC and to the fast OCP comparator. This signal is referred to AGND. The resistors on this input must have a tolerance specification of 0.5% or better to allow for trimming. 7 SR1 PWM logic output drive. This pin can be disabled when not in use. This signal is referred to AGND. 8 SR2 PWM logic output drive. This pin can be disabled when not in use. This signal is referred to AGND. 9 OUTA PWM logic output drive. This pin can be disabled when not in use. This signal is referred to AGND. 10 OUTB PWM logic output drive. This pin can be disabled when not in use. This signal is referred to AGND. 11 OUTC PWM logic output drive. This pin can be disabled when not in use. This signal is referred to AGND. This pin can also be programmed as a synchronization output. 12 OUTD PWM logic output drive. This pin can be disabled when not in use. This signal is referred to AGND. This pin can also be programmed as a synchronization output. 13 SYNI/FLGI Synchronization signal input. It also used as an external signal input to generate a flag condition. 14 SCL I2C/PMBus Serial Clock Input and Output (Open Drain). This signal is referred to AGND. 15 SDA I2C/PMBus Serial Data Input and Output (Open Drain). This signal is referred to AGND. 16 CTRL PMBus CONTROL signal. It is recommended that a 1 nF capacitor be included from the CTRL pin to AGND for noise debounce and decoupling. This signal is referred to AGND. 17 PG/ALT# Power Good Output (Open Drain). This signal is referred to AGND. This pin is also used PMBus ALERT# signal. 18 VCORE Output of 2.6 V regulator. Connect a minimum 330 nF decoupling capacitor from this pin to the AGND as close as possible to the IC, minimizing the PCB trace length. It is recommended that the VCORE pin not be used as a reference or to generate other logic levels using resistive dividers. 19 VDD Positive Supply voltage 3.0 V to 3.6 V referred to AGND. Connect a 2.2 μF decoupling capacitor from this pin to the AGND as close as possible to the IC, minimizing the PCB trace length. ADP1051 1 2 VS- VS+ CTRL VF CS1 3 4 5 7 8 9 10 11 24 23 22 21 20 18 17 16 15 14 PG/ALT# SYNI/FLGI SDA SCL VCORE TOP VIEW (Not to Scale) 6 12 13 19 CS2- CS2+ |
Аналогичный номер детали - ADP1051 |
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Аналогичное описание - ADP1051 |
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