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ADP1043 데이터시트(PDF) 3 Page - Analog Devices

부품명 ADP1043
부품 상세설명  Digital Controller for Isolated Power Supply Applications
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ADP1043 데이터시트(HTML) 3 Page - Analog Devices

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Preliminary Technical Data
ADP1043
Rev. PrA | Page 3 of 8
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
PIN 1
INDICATOR
1
VS2
2
AGND
3
VS1
4
CS2–
5
CS2+
6
ACSNS
7
CS1
8
PGND
24 SHAREi
23 SHAREo
22 PGOOD1
21 PGOOD2
20 FLAGIN
19 PSON
18 SDA
17 SCL
ADP1043
TOP VIEW
(Not to Scale)
Figure 3. Pin Configuration
Table 1. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
VS2
Power Supply Output Sense Input. This signal is referred to PGND. Input to a low
frequency Σ-Δ ADC. Nominal voltage at this pin should be 1 V.
2
AGND
Analog Ground. This pin is the ground for the analog circuitry of the ADP1043. Star
connect to DGND.
3
VS1
Local Voltage Sense Input. This signal is referred to PGND. Input to a high frequency Σ-Δ
ADC. Nominal voltage at this pin should be 1 V.
4
CS2−
Inverting Differential Current Sense Input. Nominal voltage at this pin should be 1 V for
best operation. When using high-side current sense in a 12 V application, a 110 kΩ
resistor should be placed between the sense resistor and this pin. When using low-side
current sense, a 10 kΩ resistor should be placed between the sense resistor and this pin.
When using high-side, use the formula R = (VCOMMONMODE − 1)/100 μA.
5
CS2+
Noninverting Differential Current Sense Input. Nominal voltage at this pin should be 1 V
for best operation. When using high-side current sense in a 12 V application, a 110 kΩ
resistor should be placed between the sense resistor and this pin. When using low-side
current sense, a 10 kΩ resistor should be placed between the sense resistor and this pin.
When using high-side, use the formula R = (VCOMMONMODE − 1)/100 μA.
6
ACSNS
AC Sense Input. This input is connected upstream of the main inductor through a
resistor divider network. The nominal voltage at this pin should be 1 V. This signal is
referred to PGND.
7
CS1
Primary Side Differential Current Sense Input. This is the current transformer input to
measure and control the primary side current. This signal is referred to PGND.
8
PGND
Power Ground. This pin is the ground connection for the main power rail of the power
supply. Star connect to AGND.
9
SR1
Synchronous Rectifier Output. This PWM output is connected to the input of a FET driver.
This pin can be disabled when not in use. This signal is referred to AGND.
10
SR2
Synchronous Rectifier Output. This PWM output is connected to the input of a FET driver.
This pin can be disabled when not in use. This signal is referred to AGND.
11
OUTA
PWM Output for Primary Side Switch. This pin can be disabled when not in use. This
signal is referred to AGND.
12
OUTB
PWM Output for Primary Side Switch. This pin can be disabled when not in use. This
signal is referred to AGND.
13
OUTC
PWM Output for Primary Side Switch. This pin can be disabled when not in use. This
signal is referred to AGND.
14
OUTD
PWM Output for Primary Side Switch. This pin can be disabled when not in use. This
signal is referred to AGND.
15
OUTAUX
Auxiliary PWM Output. This pin can be disabled when not in use. This signal is referred
to AGND.
16
GATE
OrFET Gate Drive Output. This output is open drain. This signal is referred to AGND.


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