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PDF uP6204 Data sheet ( Hoja de datos )

Número de pieza uP6204
Descripción Compact Three-Phase Synchronous-Rectified Buck Controller
Fabricantes uPI Semiconductor 
Logotipo uPI Semiconductor Logotipo



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No Preview Available ! uP6204 Hoja de datos, Descripción, Manual

Preliminary
uP6204
Compact Three-Phase
Synchronous-Rectified Buck Controller
General Description
The uP6204 is a compact three-phase synchronous-rectified
Buck controller specifically designed to deliver high quality
output voltage for high power applications. This part is
capable of delivering up to 90A output current thanks to its
embedded bootstrapped drivers that support 12V + 12V
driving capability. The built-in bootstrap diode simplifies the
circuit design and reduces external part count and PCB
space.
The output voltage is precisely regulated to the reference
inputs R1/R2/R3/R4 that are selected by VID inputs VID1
and VID0. The reference voltage can also be programmed
by I2C interface.
The uP6204 adopts DCR current sensing technique for over
current protection and droop tuning. Current balance is
achieved by sensing the phase current through RDS(ON) of
lower MOSFET when it turns on.
This part features comprehensive protection functions
including over current protection, input/output under voltage
protection, over voltage protection and over temperature
protection.
Other features include adjustable soft start, adjustable
operation frequency, and quick response to step load
transient. With aforementioned functions, this part provides
customers a compact, high efficiency, well-protected and
cost-effective solutions. This part comes to VQFN6x6-40L
package.
Features
† Operate with 10.8V ~13.2V Supply Voltage
† 12V Bootstrapped Drivers with Internal
Bootstrap Diode
† Flexible Reference Voltage for Power Play
„ External Reference Input R1/R2/R3/R4
Selected by VID1 and VID0
„ Internal Reference Voltage Programmed by
I2C
† Simple Single-Loop Voltage-Mode Control
† DCR Current Sensing for Over Current
Protection and Droop Tuning
† RDS(ON) Current Sensing for Current Balance
† Adjustable Operation Frequency form 50kHz to
1MHz Per Phase
† External Compensation
† Adjustable Soft Start
† VQFN6x6-40L Package
† RoHS Compliant and 100% Lead (Pb)-Free
Pin Configuration
Applications
† Middle-High End GPU Core Power
PHASE3 31
LGATE3 32
VCC2 33
20 FB
19 FBRTN
18 CSP
† High End Desktop PC Memory Core Power
UGATE2 34
17 CSN
† Low Output Voltage, High Power Density DC-DC
BOOT2 35
PHASE2 36
41
GND
16 ISEN3
15 ISEN2
Converters
LGATE2 37
14 ISEN1
† Voltage Regulator Modules
VCC1 38
LGATE1 39
13 R4
12 R1
Ordering Information
PHASE1 40
11 R2
Order Number Package Type
uP6204AQAJ VQFN6x6-40L
Remark
Note: uPI products are compatible with the current IPC/
JEDEC J-STD-020 and RoHS requirements. They are 100%
matte tin (Sn) plating and suitable for use in SnPb or Pb-
free soldering processes.
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P01, File Name: uP6204-DS-P01000
1

1 page




uP6204 pdf
Preliminary
uP6204
Functional Block Diagram
SCL
SDA
FBRTN
SS
COMP
EAP
FB
I2C
Manager
Unit
Reference & DAC
Generator
OTA
VREF
Error
Amplifier
VEAP + 200mV
OVP
P*IAVG
VEAP - 300mV
UVP
IMAX
3.0V
OCP
ISEN1
ISEN2
ISEN3
CSP
Current
Balance
CSN
IAVG GM2
MODE
RT
PSI
Oscillator
&
Phase
Selection
VRHOT/EN
0.3V
Chip Enable
5VCC
28% of 5VCC
POR
Internal
Regulator
PWM1
Gate
Control
Logic
PWM2
Gate
Control
Logic
POR
PWM3
Gate
Control
Logic
TCS
BOOT1
UGATE1
PHASE1
LGATE1
BOOT2
UGATE2
PHASE2
LGATE2
VCC2
BOOT3
UGATE3
PHASE3
LGATE3
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P01, File Name: uP6204-DS-P01000
5

5 Page





uP6204 arduino
Preliminary
uP6204
Functional Description
is over the over temperature warning level.
A PTC network is used to monitor the converter temperature.
The uP6204 asserts over demarcature warning and turns
on the internal MOSFET if
VIMAX
(2V/Div)
VOUT
(1V/Div)
UGATE1
(20V/Div)
RPTC > 0.28
RPTC + R1
The VRHOT/EN is clamped to 0.45V by internal diode and
is OK to keep the uP6204 enabled. It is highly suggest to
use 10kΩ pull high resistance so that the VRHOT/EN
can be properly clamped.
The uP6204 asserts thermal shutdown and turns off upper/
lower MOSFETs if
Time: (10ms/Div)
Figure 8. Over Current Protection.
Dynamic Phase Reduction
The uP6204 dynamically reduces the phase number of
operation to reduce the switching and conduction loss at
light load condition. This yield high efficiency over wide range
of output current.
The 20uA current source out of PSI pin produces a voltage
cross the resistor RPSI connected to this pin.
VPSI = IPSI × RPSI
The uP6204 operates with single phase if V is smaller
IMAX
than VPSI. (VPSI < 0.2V) disables the dynamic phase reduction
function.
Over Voltage and Under Voltage Protection
The FB voltage is monitored for under voltage and over
voltage protection. The OVP is triggered and turns on the
lower MOSFETs if VFB > VREF + 200mV with 10us dealy.
The OVP function is latch-off type and can only be reset by
POR or toggling the VRHOT/EN pin.
The UVP is triggered and turns off upper/lower MOSFETs if
VFB < VEAP - 300mV with 10us dealy. The UVP function
is latch-off type and can only be reset by POR or toggling
the VRHOT/EN pin.
The OVP and UVP functions are blocked about 20us when
reference voltage is changed either by PVID or SVID.
Temperature Monitoring and Chip Enable
The VRHOT/EN is multifunctional pin: high temperature
warning and chip enable as shown in Figure 9. Pulling this
pin low shuts down the uP6204. The VRHOT/EN is pulled
high to 5VCC when released. This enables the uP6204.
This pin is clamped to 0.45V when the sensed temperature
RPTC > 0.33
RPTC + R1
An NTC network is also OK for temperature monitoring.
5VCC
VRHOT/EN
10k ohm
R1 TCS
PTC
uP6204
0.3V
Thermal
Shutdown
Chip Enable
33% of
5VCC
28% of
5VCC
Figure 9. Temperature Monitoring and Chip Enable.
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P01, File Name: uP6204-DS-P01000
11

11 Page







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