TDA21302
TDA21302 Datasheet
DS-CoreControl-TDA21302
| Part | Datasheet |
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TDA21302 |
TDA21302 (pdf) |
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| Version , May 2004 Datasheet DS-CoreControl-TDA21302 TDA21302 Authors: Edward Chang Published by Infineon Technologies AG Power Management & Supply CoreControl TM N e v e r s t o p t h i n k i n g. Page 1 of 25 DS-CoreControl-TDA21302 Contents: Pinout Drawing and General Block Reference Absolute Maximum Rating 7 Thermal 7 Electrical Characteristic 7 Operating 9 VRD10,x VID Table 10 Application Information 11 Voltage Current Load Fault Phase Setting and Converter Start Current Sensing DAC Offset Voltage & Droop Protection and SS Design Procedure Suggestion 16 Design 17 Layout Guide 20 Outline CoreControl TM Page 2 of 25 DS-CoreControl-TDA21302 Multi-Phase PWM Controller for CPU Core Power Supply Features : P-DSO-32 • Multi-Phase PWM Conversion with Automatically Phase Selection • VRD10.X Compliant • Active Droop Compensation For Fast Load Response • Smooth VCORE Voltage Transition during the VID On The Fly • Power Stage Thermal Balance By Sync FET Rds on Current Sense Technique • Hiccup Mode Over Current Protection • Programmable Switching Frequency 50KHz ~ 400KHz per Phase , Under Voltage Lockout, and Soft-Start • High Output Ripple Frequency times numbers of working Channels Application : • Intel Processor Voltage Regulator VRM10.X • Low Output Voltage High Output Current DC-DC Converters • Voltage Regulator Modules Type TDA21302 Package P-DSO-32 Marking 21302 Ordering Code Q67042-S4229 Pinout Drawing and Description : CoreControl TM Page 3 of 25 DS-CoreControl-TDA21302 CoreControl TM Page 4 of 25 DS-CoreControl-TDA21302 Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Name OVP PGOOD VID4 VID3 VID2 VID1 VID0 VID125 VOSS ADJ SS FB COMP VDIF ISN4 ISN3 ISN2 ISN1 VSEN SGND GND PWM3 ISP3 ISP1 PWM1 PWM2 ISP2 ISP4 PWM4 VCC DVD Over voltage trip output Open drain power good signal output pin Voltage Identification DAC Input. Internally pull up to 3V. Voltage Identification DAC Input. Internally pull up to 3V. Voltage Identification DAC Input. Internally pull up to 3V. Voltage Identification DAC Input. Internally pull up to 3V. Voltage Identification DAC Input. Internally pull up to 3V. Voltage Identification DAC Input. Internally pull up to 3V. Connect a resistor to GND to set the initial offset voltage. Connect a resistor to GND to set the Droop Voltage. Soft-Start. Connect with a capacitor to GND to set the Soft-Start Interval. Pulling down this pin below 1V shall shut the converter down. Internal error amplifier inverting input pin Output of the error amplifier and input of the PWM comparator Output pin of the differential converter output voltage sense Differential current sense negative input pin connects to the drain pin of channel 4 Sync FET Differential current sense negative input pin connects to the drain pin of channel 3 Sync FET Differential current sense positive input pin connects to the drain pin of channel 2 Sync FET Differential current sense positive input pin connects to the drain pin of channel 1 Sync FET The positive input pin of the differential converter output voltage sense amplifier The negative input pin of the differential converter output voltage sense amplifier Ground pin of the IC Channel 3 PWM output pin. Connect to high level for 2 phase operation. Differential current sense positive input pin connects to the source pin of channel 3 Sync FET Differential current sense positive input pin connects to the source pin of channel 1 Sync FET Channel 1 PWM output pin Channel 2 PWM output pin Differential current sense positive input pin connects to the source pin of channel 2 Sync FET Differential current sense positive input pin connects to the source pin of channel 4 Sync FET Channel 4 PWM output pin. Connect to high level for 2 or 3 phase operation. IC power supply pin connects to 5V Connect the external voltage divider to program the controller under voltage lockout based on the input voltage of the power stage voltage Connect a resistor to GND to set the channel switching frequency CoreControl TM Page 5 of 25 DS-CoreControl-TDA21302 TDA21302 is a multi-phase DC-DC buck converter controller integrated all control functions for the next generation GHz CPU voltage regulator. TDA21302 automatically controls 2 to 4 interleaved buck switching power stage operation. The multi-phase architecture is able to provide high output current with lower power dissipation on the switching devices and minimizing the input ripple current and output ripple voltage. The equivalent high operation frequency optimizes the voltage regulator design for better transient response and thermal performance. TDA21302 utilizes the Sync FET Rds on in every channel as the current sense element. The differential current sense in every channel results precious channel current information to the controller for good droop adjustment, channel current balance, channel switching devices thermal balance and over current protection. Block Diagram VID0 VID1 VID2 VID DAC VID3 & Step VID4 Control VOSS Offset Setting SGND I VSEN OVP Setting PG Setting VDIF FB COMP PGOOD VCC Power On Reset Oscillatior & Sawtooth Setting Soft Start Current Correction |
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