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PDF ADP1046 Data sheet ( Hoja de datos )
| Número de pieza | ADP1046 | |
| Descripción | Digital Controller | |
| Fabricantes | Analog Devices | |
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Data Sheet
Digital Controller for Isolated
Power Supply Applications
ADP1046
FEATURES
GENERAL DESCRIPTION
Integrates all typical PWM controller functions
7 PWM control signals
Digital control loop
Integrated programmable loop filters
Programmable voltage line feedforward
Dedicated soft start filter
Programmable dead time for improved efficiency
Remote and local voltage sense
Primary and secondary side current sense
Synchronous rectifier control
Current sharing
OrFET control
I2C interface
Extensive fault detection and protection
Extensive programming and telemetry
Fast digital calibration
User accessible EEPROM
APPLICATIONS
AC-to-DC power supplies
Isolated dc-to-dc power supplies
Redundant power supply systems
Server, storage, network, and communications
infrastructure
The ADP1046 is a flexible, digital secondary side controller
designed for ac-to-dc and isolated dc-to-dc secondary side
applications. The ADP1046 is pin-compatible with the
ADP1043A and offers several enhancements and new features,
including voltage feedforward, improved loop response, and
programmable dead time control to maximize efficiency.
The ADP1046 is optimized for minimal component count,
maximum flexibility, and minimum design time. Features
include local and remote voltage sense, primary and secondary
side current sense, digital pulse-width modulation (PWM)
generation, current sharing, and redundant OrFET control. The
control loop digital filter and compensation terms are integrated
and can be programmed over the I2C interface. Programmable
protection features include overcurrent protection (OCP), over-
voltage protection (OVP), undervoltage lockout (UVLO), and
overtemperature protection (OTP).
The built-in EEPROM provides extensive programming of the
integrated loop filter, PWM signal timing, inrush current, and
soft start timing and sequencing. Reliability is improved through
a built-in checksum and programmable protection circuits.
www.DataSheet.co.kr A comprehensive GUI is provided for easy design of loop
filter characteristics and programming of the safety features.
The industry-standard I2C bus provides access to the many
monitoring and system test functions.
The ADP1046 is available in a 32-lead LFCSP and operates
from a single 3.3 V supply.
TYPICAL APPLICATION CIRCUIT
DC
INPUT
LOAD
DRIVER
iCoupler
DRIVER
DRIVER
SR1 SR2
CS1
ACSNS
CS2– CS2+ PGND
VS1 GATE VS2
VS3+
OUTA
OUTB
OUTC
OUTD
ADP1046
OUTAUX
RES ADD RTD VCORE FLAGIN PSON PGOOD2 PGOOD1 SDA SCL
VS3–
SHAREo
SHAREi
VDD DGND AGND
VDD
MICROCONTROLLER
Figure 1.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2012 Analog Devices, Inc. All rights reserved.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
Data Sheet
ADP1046
SPECIFICATIONS
VDD = 3.0 V to 3.6 V, TA = −40°C to +125°C, unless otherwise noted. FSR = full-scale range.
Table 1.
Parameter
SUPPLY
Supply Voltage
Supply Current
POWER-ON RESET
Power-On Reset
UVLO
UVLO Hysteresis
OVLO
OVLO Debounce
VCORE PIN
Output Voltage
OSCILLATOR AND PLL
PLL Frequency
OUTA, OUTB, OUTC, OUTD,
OUTAUX, SR1, SR2, GATE PINS
Output Low Voltage
Output High Voltage
Rise Time
Fall Time
VS1, VS2, VS3 LOW SPEED ADCs
Input Voltage Range
Usable Input Voltage Range
ADC Clock Frequency
Register Update Rate
Voltage Sense Measurement
Accuracy
Temperature Coefficient
Leakage Current
Voltage Sense Measurement
Resolution
Common-Mode Voltage Offset
Voltage Differential from VS3−
to PGND
VS1 Accurate OVP Speed
VS1 OVP Threshold Accuracy
VS2 and VS3 OVP Speed
VS2 and VS3 OVP Threshold
Accuracy
Symbol Test Conditions/Comments
VDD 4.7 μF capacitor connected to AGND
IDD Normal operation (PSON is high or low)
During EEPROM programming (40 ms)
Shutdown (VDD below UVLO)
VDD rising
VDD falling
When set to 2 μs
When set to 500 μs
0.33 μF capacitor connected to DGND
TA = 25°C
RES = 10 kΩ (±0.1%)
VOL Source current = 10 mA
VOH Source current = 10 mA
CLOAD = 50 pF
CLOAD = 50 pF
www.DataSheet.co.kr
VIN Differential voltage from VS1, VS2 to
PGND, and from VS3+ to VS3−
Factory trimmed at 1.0 V
0% to 100% of usable input voltage range
10% to 90% of usable input voltage range
900 mV to 1.1 V
Register 0x32[1:0] = 00; equivalent
resolution is 7 bits
Relative to nominal voltage (1 V) on VS1
Register 0x33[1:0] = 00; equivalent
resolution is 7 bits
Relative to nominal voltage (1 V) on VS2
and VS3
Min
3.0
2.75
3.8
2.4
190
VDD − 0.4
0
0
−3.0
−48
−2.0
−32
−1.0
−16
−0.25
−200
−2.0
−2.0
Rev. 0 | Page 5 of 96
Typ
3.3
20
IDD + 8
100
2.85
40
4.0
2.0
500
2.5
200
3.5
1.5
1
1.56
10
12
80
80
Max
3.6
3.0
2.97
4.1
2.7
210
0.4
1.6
1.4
+3.0
+48
+2.0
+32
+1.0
+16
65
1.0
+0.25
+200
+2.0
+2.0
Unit
V
mA
mA
μA
V
V
mV
V
μs
μs
V
MHz
V
V
ns
ns
V
V
MHz
ms
% FSR
mV
% FSR
mV
% FSR
mV
ppm/°C
μA
Bits
% FSR
mV
μs
% FSR
μs
% FSR
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADP1046
VS2 1
AGND 2
VS1 3
CS2– 4
CS2+ 5
ACSNS 6
CS1 7
PGND 8
PIN 1
INDICATOR
ADP1046
TOP VIEW
(Not to Scale)
24 SHAREi
23 SHAREo
22 PGOOD1
21 PGOOD2
20 FLAGIN
19 PSON
18 SDA
17 SCL
NOTES
1. THE ADP1046 HAS AN EXPOSED THERMAL PAD ON THE UNDERSIDE
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.
Figure 4. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 VS2 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.
2
AGND
Analog Ground. This pin is the ground for the analog circuitry and the return for the VDD pin of the ADP1046.
3 VS1 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 awww.DataSheet.co.kr tolerance specification of 0.5% or better to allow for trimming.
4
CS2−
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 = (VOUT − 1)/2 mA. A 0.1% resistor must be used to connect this circuit. If this pin is not used, connect it 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.
5
CS2+
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 = (VOUT − 1)/2 mA. A 0.1% resistor must be used to connect this circuit. If this pin is not used, connect it
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.
6
ACSNS
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.
7 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 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.
8
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.
9 SR1 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.
10 SR2
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.
11 OUTA PWM Output for Primary Side Switch. This pin can be disabled when not in use. This signal is referenced to AGND.
12
OUTB
PWM Output for Primary Side Switch. This pin can be disabled when not in use. This signal is referenced to AGND.
Rev. 0 | Page 11 of 96
Datasheet pdf - http://www.DataSheet4U.net/
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