Datasheet ADP1032 (Analog Devices)

Two-Channel, Isolated Micropower Management Unit with Seven Digital Isolators Data Sheet ADP1032 FEATURES TYPICAL APPLICATION CIRCUIT VINP V Wide input supply voltage range: 4.5 V to 60 V OUT1 D1 4.5V TO 60V 6V TO 28V Integrated flyback power switch Z R CLAMP FT1 CFLYBK Generates two isolated, well regulated independent outputs DCLAMP Tx1 RFB1 VOUT1: 24 V or 6 V to 28 V VOUT2: 3.3 V, 5.0 V, or 5.15 V VINP SWP FB1 SGND2 Uses a 1:1 ratio transformer for simplified transformer design R3 VOUT1 Peak current limiting and OVP for flyback and buck regulators CIN EN SYNC R2 Precision enable input and power-good output PGND VOUT2 PGNDP Adjustable switching frequency via SYNC input 3.3V, 5.0V, 5.15V GNDP VOUT2 Internal compensation and soft start control per regulator SLEW SW2 L1 CBUCK High speed, low propagation delay, SPI signal isolation channels ADP1032 ISOLATED GPIO ISOLATED GPIO Three 100 kbps general-purpose isolated data channels CHANNELS AND SPI CHANNELS AND SPI INTERFACE INTERFACE 41-lead, 9 mm × 7 mm LFCSP form factor enables small V overall solution size SVDD 1.8V TO 5.5V PWRGD SVDD2 −40°C to +125°C operating junction temperature range VMVDD C3 R1 Safety and regulatory approvals (pending) 2.3V TO 5.5V SGND2 MVDD CISPR11 Class B radiated emission SVDD1 C1 UL recognition: 2500 V rms for 1 minute duration per UL 1577 C4
1
MGND SGND1
00 3-
CSA Component Acceptance Notice 5A
36 20
300 V rms basic insulation between slave, master, and
Figure 1.
field power domains (IEC 61010-1, pending)
The two regulators are phase shifted relative to each other to
VDE certificate of conformity
reduce electromagnetic interference (EMI). The ADP1032 can
DIN V VDE 0884-10 (VDE 0884-10):2006-12
be driven by an external oscillator in the range of 350 kHz to
VIORM = 565 VPEAK
750 kHz to ease noise filtering in sensitive applications.
APPLICATIONS
The digital isolators integrated in the ADP1032 use Analog
Industrial automation and process control
Devices, Inc., iCoupler® chip scale transformer technology,
Instrumentation and data acquisition systems
optimized for low power and low radiated emissions.
Data and power isolation
The ADP1032 is available in a 9 mm × 7 mm, 41-lead LFCSP and
GENERAL DESCRIPTION
is rated for a −40°C to +125°C operating junction temperature range. The ADP1032 is a high performance, isolated micropower management unit (PMU) that combines an isolated flyback and a
Table 1. Family Models
dc-to-dc regulator providing two isolated power rails. Additionally,
Flyback Switch Buck Switch Inverter Switch
the ADP1032 contains four high speed serial peripheral interface
Model (mA) (mA) (mA)
(SPI) isolation channels and three general-purpose isolators for ADP1031 300 300 300 channel to channel applications where low power dissipation ADP1032 440 300 Not applicable and small solution size is required. Operating over an input
COMPANION PRODUCTS
voltage range of 4.5 V to 60 V, the ADP1032 generates isolated output voltages of 6 V to 28 V (adjustable version) or 24 V
Analog Output DAC: AD5758 Universal Analog input: AD4110-1
(fixed version) for VOUT1, and factory programmable voltages
Software Defined Input/Output: AD74412R
of 5.15 V, 5.0 V, or 3.3 V for VOUT2.
Precision Data Acquisition Subsystem: AD7768-1
By default, the ADP1032 flyback regulator operates at a 250 kHz
Additional companion products on the ADP1032 product page
switching frequency, and the buck regulator operates at 125 kHz.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT COMPANION PRODUCTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS REGULATORY INFORMATION ELECTROMAGNECTIC COMPATIBILITY INSULATION AND SAFETY RELATED SPECIFICATIONS DIN V VDE 0884-10 (VDE V 0884-10) INSULATION CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION FLYBACK REGULATOR Flyback Regulator Operation Power Saving Mode (PSM) Flyback Undervoltage Lockout (UVLO) Flyback Regulator Precision Enable Control Flyback Regulator Soft Start Flyback Slew Rate Control Flyback Regulator Overcurrent Protection Flyback Regulator Overvoltage Protection BUCK REGULATOR Buck Regulator Operation Buck Regulator UVLO Buck Regulator Soft Start Buck Regulator Current-Limit Protection Buck Regulator Active Pull-Down Resistor Buck Regulator OVP POWER GOOD POWER-UP SEQUENCE OSCILLATOR AND SYNCHRONIZATION THERMAL SHUTDOWN DATA ISOLATION High Speed SPI Channels GPIO Data Channels APPLICATIONS INFORMATION COMPONENT SELECTION Feedback Resistors Capacitor Selection FLYBACK REGULATOR COMPONENTS SELECTION Input Capacitor Output Capacitor Ripple Current vs. Capacitor Value Schottky Diode Transformer Turn Ratio Primary Inductance Flyback Transformer Saturation Current Series Winding Resistance Leakage Inductance and Clamping Circuits Clamping Resistor Clamping Capacitor Clamping Diode Diode, Zener Diode Clamp Ripple Current (IAC) vs. Inductance Maximum Output Current Calculation BUCK REGULATOR COMPONENTS SELECTION Inductor Output Capacitor INSULATION LIFETIME Surface Tracking Insulation Wear Out Calculation and Use of Parameters Example THERMAL ANALYSIS TYPICAL APPLICATION CIRCUIT PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE