UP6204 Ver la hoja de datos (PDF) - Unspecified

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UP6204

Compact Three-Phase Synchronous-Rectified Buck Controller

Unspecified 

Preliminary

uP6204

Functional Pin Description

No. Pin Name Pin Function

23

SS

Soft Start Output. Connect a capacitor from this pin to GND to set the soft start interval.

Positive Input of the Error Amplifier. The FB voltage is regulated to track this voltage

24

EAP during soft start, power play and steady state operation. Connect a resistor to SS pin to

tuning the droop slope.

Output Current Indication and Over Current Setting. Connect a resistor between this

25

IMAX

pin and GND to set the trigger threshold level for over current protection. This pin also

intends for output current indication since its voltage is directly proportional to the output

current.

Phase Number of Operation Setting. Connect this pin to GND for three phase operation.

26

MODE

Connect this pin to 5VCC for two phase operation. Let this pin open for single phase

operation. Only phase 1 is enabled when single phase operation. Only phase 1 & 2 are

enabled when two phase operation.

27

TCS Temperature Sensing.

28

5VCC

Internal Regulator Output. This is the output pin of linear regulator for internal bias and

external usage. The output current capability is 20mA.

Switch Node for Channel 1/2/3. Connect these pins to the source of the corresponding

upper MOSFET and the drain of the corresponding lower MOSFET. These pins are also

40/36/31

PHASE1/2/3

monitored by the adaptive shoot-through protection circuitry to determine when the upper

corresponding MOSFET has turned off. A Schottky diode between this pin and ground is

recommended to reduce negative transient voltage which is common in a power supply

system.

Lower Gate Driver Output for Channel 1/2/3. Connect these pins to the corresponding

39/37/32 LGATE1/2/3 gate of lower MOSFET. These pins are monitored by the adaptive shoot-through protection

circuitry to determine when the corresponding lower MOSFET has turned off.

Supply Input for Gate Driver 3. This pin provides current for lower gate drivers, and the

33

VCC2 bootstrap circuit for upper drivers of channel2/3. Connect this pin to the power input of

channel 2 or channel 3.

Supply Input for Gate Driver 1/2 and the Chip. This pin provides current for lower gate

38

VCC1 drivers, and the bootstrap circuit for upper drivers of channel1 and the control circuit of the

uP6204. Connect this pin to the power input of of channel1.

Exposed Pad

41 GND

Ground for the IC. The exposed pad should be well solder to PCB and electraically

connected ground island/plane with short and wide traces.

uPI Semiconductor Corp., http://www.upi-semi.com

4

Rev. P01, File Name: uP6204-DS-P0100

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