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參數(shù)資料
| 型號(hào)： | TDA21302 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Multi-Phase PWM Controller for CPU Core Power Supply |
| 中文描述： | 多相PWM控制器，電源為CPU內(nèi)核電源 |
| 文件頁數(shù)： | 13/25頁 |
| 文件大小： | 588K |
| 代理商： | TDA21302 |
CoreControl
TM
Page 13 of 25
DS-CoreControl-TDA21302
Current Balance
TDA21302 senses the current of the Sync FET in each phase when it is conducting for channel balance
and droop tuning. The differential sensing GM amplifier converts the voltage on the sense components
which can be sense resistors or the Rds(on) of the Sync FET to current signal into internal balance
circuit. The current balance circuit sums and averages the current signals and then generates the
balancing signals injected to pulse signal modulator. If some of the channel current is higher than
average, the balancing signal shall decrease the pulse width to keep the current balance.
Load Droop
The sensed channel current signals regulated the reference of DAC to form a output voltage droop
proportional to the load current. The droop or so-called “ Active Voltage Positioning “ can reduce the
output voltage ripple during the load transient and the size of the LC filters.
Fault Detection
The chip detects V
CORE
for over voltage and power good detection. The “ hiccup mode “ operation of
over-current protection is adopted to reduce the short circuit current. The inrush current at the start up is
suppressed by the soft start circuit through clamping the pulse width and output voltage.
PWM3
PWM2
PWM1
Oscillatior &
Sawtooth
+
I
PWM Logic
INH
PWM CMP
INH
+
I
PWM Logic
PWM CMP
INH
+
I
PWM Logic
INH
PWM CMP
+
I
PWM Logic
PWM CMP
+
I
+
I
+
I
+
I
Current
Correction
SUM/M
+
+
+
+
+
+
+
+
PWM4
ISN1
ISP1
ISN4
ISP4
ISP3
ISN3
ISP2
ISN2
RT
COMP
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