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ISL78226ANZ Datasheet(PDF) 3 Page - Renesas Technology Corp |
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ISL78226ANZ Datasheet(HTML) 3 Page - Renesas Technology Corp |
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3 / 121 page  ISL78226 FN8887 Rev.2.00 Page 3 of 121 Oct 19, 2017 Table of Contents Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Typical Application Schematics. . . . . . . . . . . . . . . . . . . . . . .13 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . .16 Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Recommended Operating Conditions . . . . . . . . . . . . . . . . .16 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . .29 Operation Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Bidirectional Power Conversion . . . . . . . . . . . . . . . . . . . . . . . . 51 Multiphase Interleaving Control. . . . . . . . . . . . . . . . . . . . . . . . 51 Oscillator and Clock Synchronization . . . . . . . . . . . . . . . . . . . 52 Output Voltage Regulation Loop . . . . . . . . . . . . . . . . . . . . . . . 52 Peak Current Mode Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3-State PWM Control Output . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Boot Refreshing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Current Sharing between Phases . . . . . . . . . . . . . . . . . . . . . . 53 Tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Current Sense. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Current Monitoring — IMON . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Adjustable Slope Compensation . . . . . . . . . . . . . . . . . . . . . . . 55 Light-Load Efficiency Enhancement . . . . . . . . . . . . . . . . . . . . 56 Diode Emulation at Light-Load Condition . . . . . . . . . . . . 56 Pulse Skipping at Deep Light-Load Condition . . . . . . . . . 56 Automatic Phase Dropping/Adding . . . . . . . . . . . . . . . . . 56 Average Current Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Average Constant Current Control Loop (CCL) . . . . . . . . . 57 Average Overcurrent Protection (AOCP) . . . . . . . . . . . . . . 57 Power Supply to the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Enabling the Device (EN Pin) . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Initialization and Startup Sequence . . . . . . . . . . . . . . . . . . . . 58 Initialization and Internal Bias Circuit Startup . . . . . . . . . 58 LDOs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Backup LDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Internal 5.2V LDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 MCULDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Flyback Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Fault Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 12V/48V (BAT12/BAT48) Rail Input/Output Overvoltage and Undervoltage Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 VIN Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . 62 Flyback Output (V12/V6) Over/Undervoltage Detection and Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Flyback Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . 63 Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Cycle-by-Cycle Overcurrent Limiting (OC1) . . . . . . . . . . . . 63 Inductor Peak Current Overcurrent Protection (OC2) . . . 63 Average Overcurrent Protection (AOCP) . . . . . . . . . . . . . . 63 Negative Overcurrent Protection (NOC) . . . . . . . . . . . . . . 64 Fault Phase Removal (Phase-Disable) . . . . . . . . . . . . . . . 64 Overriding Individual Fault Responses . . . . . . . . . . . . . . . 64 Operation Mode Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Converter Direction Selection . . . . . . . . . . . . . . . . . . . . . . 64 PWM Output Mode Selection . . . . . . . . . . . . . . . . . . . . . . . 64 Switching Mode and Fault Response Selection . . . . . . . 64 Master Controller and Slave Controller Setting . . . . . . . 64 Operating Phase Count Setting and Phase Shifting. . . . . . . 65 I2C/PMBus Communication . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Monitor Faults and Configure Fault Responses. . . . . . . . 65 Set Operation/Fault Thresholds via I2C/PMBus . . . . . . 65 Accessible Timing for I2C/PMBus Registers Status . . . 65 Control and Status Registers . . . . . . . . . . . . . . . . . . . . . . . . 66 Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Control Register 1 (0xB0) . . . . . . . . . . . . . . . . . . . . . . . . . 66 Individual Fault Response Control Register 1 (0xB1) . . . 67 Individual Fault Response Control Register 2 (0xB2) . . . 70 Individual Fault Response Control Register 3 (0xB3) . . . 72 Individual Fault Response Control Register 4 (0xB4) . . . 74 Individual Fault Response Control Register 6 (0xB6) . . . 76 Individual Fault Response Control Register 6 (0xB7) . . . 77 Individual Fault Response Control Register 7 (0xB8) . . . 79 BAT12 Overvoltage Threshold Setting Register (0xB9) . 82 BAT12 and BAT48 Undervoltage Threshold Setting Register (0xBA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 BAT48 Overvoltage Threshold Setting Register (0xBB) . 84 Individual Phase Removal Control Register (0xBC) . . . . 85 Serious Fault Response Control Register (0xBD) . . . . . . 86 Minimum On-Time, Current Balancing Setting Register (0xBE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Maximum On-Duty Setting Register (0xBF) . . . . . . . . . . . 89 Boot Refresh Control Register (0xEC). . . . . . . . . . . . . . . . 90 CCL/ACL Threshold Control Register (0xED) . . . . . . . . . . 91 WRITE_PROTECT (10h). . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Status Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Fault Index Register (0xC0) . . . . . . . . . . . . . . . . . . . . . . . . 93 Fault Status Register-1 (0xD2) . . . . . . . . . . . . . . . . . . . . . 94 Fault Status Register-2 (0xD3) . . . . . . . . . . . . . . . . . . . . . 96 Fault Status Register-3 (0xD4) . . . . . . . . . . . . . . . . . . . . . 97 Fault Status Register-4 (0xD5) . . . . . . . . . . . . . . . . . . . . . 98 Fault Status Register-5 (0xD6) . . . . . . . . . . . . . . . . . . . . . 99 Fault Status Register-6 (0xD7) . . . . . . . . . . . . . . . . . . . . 100 Fault Status Register-7 (0xD8) . . . . . . . . . . . . . . . . . . . . 101 Fault Status Register-8 (0xD9) . . . . . . . . . . . . . . . . . . . . 102 Fault Status Register-9 (0xDA) . . . . . . . . . . . . . . . . . . . . 103 System Status Register-1 (0xDC) . . . . . . . . . . . . . . . . . . 105 System Status Register-2 (0xDD) . . . . . . . . . . . . . . . . . . 106 System Status Register-3 (0xDF) . . . . . . . . . . . . . . . . . . 107 Device ID (0xAD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Chip Revision (0xAE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 Operation Mode Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 Converter Boost or Buck Mode Selection . . . . . . . . . . . 110 PWM Output Mode Selection . . . . . . . . . . . . . . . . . . . . . 110 Switching Mode and Fault Response Selection . . . . . . 110 Master Controller and Slave Controller Setting . . . . . . 110 Soft-Start Capacitor Selection. . . . . . . . . . . . . . . . . . . . . . . . 111 Output Voltage Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Switching Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Inductor Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Current Monitor Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 IMON Resistor and Average Constant Current Loop (CCL) Threshold Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Phase Drop/Add Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 VIN Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 |
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