ADP1046DC1-EVALZ Analog Devices, ADP1046DC1-EVALZ Datasheet - Page 11

• Manufacturer Part Number: ADP1046DC1-EVALZ
• Description: Daughter Cards & OEM Boards ADP1046 Daughter Card
• Manufacturer: Analog Devices
• Series: ADP1046r

Specifications of ADP1046DC1-EVALZ

• Rohs: yes
• Product: Daughter Cards
• Description/function: 100 kHz daughter board
• Interface Type: I2C
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3.3 V
• Factory Pack Quantity: 1
• For Use With: ADP1046

Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
Mnemonic
VS2
AGND
VS1
CS2−
CS2+
ACSNS
CS1
PGND
SR1
SR2
OUTA
OUTB
Description
Power Supply Output Voltage Sense Input. This signal is referenced to PGND and is the input to a low frequency
Σ-Δ ADC. Nominal voltage at this pin should be 1 V. The resistor divider on this input must have a tolerance
specification of 0.5% or better to allow for trimming.
Analog Ground. This pin is the ground for the analog circuitry and the return for the VDD pin of the ADP1046.
Local Output Voltage Sense Input. This signal is referenced to PGND. Nominal voltage at this pin should be 1 V.
The resistor divider on this input must have a tolerance specification of 0.5% or better to allow for trimming.
Inverting Differential Current Sense Input. Nominal voltage at this pin should be 1 V for best operation. When
using low-side current sensing, place a 5 kΩ resistor between the sense resistor and this pin. When using high-
side current sensing in a 12 V application, place a 5.5 kΩ resistor between the sense resistor and this pin. When
using high-side current sensing with a voltage other than 12 V, use this formula to calculate the resistor value:
R = (V
and set CS2± to high-side current sense mode (set Bit 2 of Register 0x27). It is recommended that a 500 pF to
1000 pF capacitor be connected either across the resistor or from this pin to AGND.
Noninverting Differential Current Sense Input. Nominal voltage at this pin should be 1 V for best operation.
When using low-side current sensing, place a 5 kΩ resistor between the sense resistor and this pin. When using
high-side current sensing in a 12 V application, place a 5.5 kΩ resistor between the sense resistor and this pin.
When using high-side current sensing with a voltage other than 12 V, use this formula to calculate the resistor
value: R = (V
to PGND and set CS2± to high-side current sense mode (set Bit 2 of Register 0x27). It is recommended that a
500 pF to 1000 pF capacitor be connected either across the resistor or from this pin to AGND.
AC Sense Input. This input is connected upstream of the main output inductor through a resistor divider
network. The nominal voltage for this circuit is 0.45 V. This pin is also connected to the voltage feedforward
ADC (nominal voltage 1 V). This signal is referenced to PGND.
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 referenced to PGND. The resistors on this input must have a tolerance specification
of 0.5% or better to allow for trimming. If this pin is not used, connect it to PGND.
Power Ground. This pin is the ground connection for the main power rail of the power supply and is the
reference for all voltage and current sensing other than CS2± and VS3±. Star connect to AGND.
Synchronous Rectifier Output. This PWM output connects to the input of a FET driver. This pin can be disabled
when not in use. This signal is referenced to AGND.
Synchronous Rectifier Output. This PWM output connects to the input of a FET driver. This pin can be disabled
when not in use. This signal is referenced to AGND.
PWM Output for Primary Side Switch. This pin can be disabled when not in use. This signal is referenced to AGND.
PWM Output for Primary Side Switch. This pin can be disabled when not in use. This signal is referenced to AGND.
OUT
− 1)/2 mA. A 0.1% resistor must be used to connect this circuit. If this pin is not used, connect it to PGND
NOTES
1. THE ADP1046 HAS AN EXPOSED THERMAL PAD ON THE UNDERSIDE
OUT
OF THE PACKAGE. FOR INCREASED RELIABILITY OF THE SOLDER
JOINTS AND MAXIMUM THERMAL CAPABILITY, IT IS RECOMMENDED
THAT THE PAD BE SOLDERED TO THE PCB AGND PLANE.
− 1)/2 mA. A 0.1% resistor must be used to connect this circuit. If this pin is not used, connect it
ACSNS
AGND
PGND
CS2–
CS2+
VS2
VS1
CS1
1
2
3
4
5
6
7
8
Figure 4. Pin Configuration
Rev. B | Page 11 of 92
(Not to Scale)
ADP1046
PIN 1
INDICATOR
TOP VIEW
24 SHAREi
23 SHAREo
22 PGOOD1
21 PGOOD2
20 FLAGIN
19 PSON
18 SDA
17 SCL
ADP1046