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PDF UP6161 Data sheet ( Hoja de datos )
| Número de pieza | UP6161 | |
| Descripción | Single 12V Input Supply Dual Regulator Synchronous Buck PWM and Linear Regulator Controller | |
| Fabricantes | UPI | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de UP6161 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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Preliminary
uP6161
Single 12V Input Supply Dual Regulator -
Synchronous-Buck-PWM and Linear-Regulator Controller
General Description
Features
The uP6161 integrates a high performance synchronous-
rectified buck controller and a linear-regulator controller.
This part works with a single +12V supply voltage and
delivers two high quality output voltages for both processing
unit and memory unit. An internal linear regulator provides
optimum 9V drive voltage for efficiency and thermal
management.
The buck controller features internal MOSFET drivers that
supports bootstrapped voltage for high efficiency power
conversion. The bootstrap diode is built-in to simplify the
circuit design and minimize external part count. It
incorporates simple, single feedback loop, voltage-control
with fast transient response.
The linear controller drives an external N-Channel MOSFET
with under voltage protection during both soft start and
normal operation.
Other features include adjustable operation frequency,
internal soft start, under voltage protection, adjustable over
current protection and shutdown function. With the above
function, this part provides customers a compact, well
protected and cost-effective solution. This part is available
in SOP-14 and QFN3x3 -16L packages.
Applications
Power Supplies for Microprocessors or
Subsystem Power Supplies
Cable Modems, Set Top Boxes, and DSL
Modems
Industrial Power Supplies; General Purpose
Supplies
12V Input DC-DC Regulators
Low-Voltage Distributed Power Supplies
Operate with Single 12V Supply
Self-Regulated 9V Drive Voltage
Integrated Boot Diode
Provide Two Regulated Voltages
One Synchronous-Rectified Buck Controller
One Linear Controller
Both Controllers Drive N-Channel MOSFETs
Smaller Converter Size
Excellent Output Voltage Regulation
1.5% for Buck Controller
2% for Linear Controller
Simple Single-Loop Control Design
Voltage-Mode PWM Control
Fast Transient Response
High-Bandwidth Error Amplifier
Lossless, Programmable Overcurrent Protection
Uses Lower MOSFET R
DS(ON)
Adjustable Frequency from 150kHz to 1MHz
Internal Soft Start for Both Outputs
Under Voltage Protection for Both Outputs
including Soft Start Cycle
SOP-14 and QFN3x3-16 packages
RoHS Compliant and 100% Lead Free
Ordering Information
Order Number Package Type
Remark
uP6161S14 SOP - 14
uP6161Q
QFN3x3 - 16
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. P00, File Name: uP6161-DS-P0001
1
1 page  
www.datasheet4u.com
Preliminary
uP6161
Functional Description
The uP6161 integrates a high performance synchronous-
rectified buck controller and a linear-regulator controller.
This part works with a single +12V supply voltage and
delivers two high quality output voltages for both processing
unit and memory unit. An internal linear regulator provides
optimum 9V drive voltage for efficiency and thermal
management.
The buck controller features internal MOSFET drivers that
supports 12V + 12V bootstrapped voltage for high efficiency
power conversion. The bootstrap diode is built-in to simplify
the circuit design and minimize external part count. It
incorporates simple, single feedback loop, voltage-control
with fast transient response.
The linear controller drives an external N-Channel MOSFET
with undervoltage protection during both softstart and normal
operation.
Other features include adjustable operation frequency,
internal softstart, undervoltage protection, adjustable
overcurrent protection and shutdown function.
Supply Voltage
The uP6161 is designed to work with a single supply rail.
It integrates two linear regulators providing optimal supply
voltages for gate drivers and control circuitry respectively
as shown in Figure 1. The 9V linear regulator generates
9V PVCC9 for gate drives achieving optimum balance
between efficiency and thermal management. The 5V linear
regulator works with VCC9 input generates VCC5 for
internal control circuitry. If 12V driving voltage is preferred,
simply connect +12V to the PVCC9 pin and let VCC12
open.
power on reset with typical rising threshold level as 7.5V.
All the three supply inputs require minimum 1uF ceramic
capacitors for local bypassing. Place the bypass capacitors
physically near the IC. No external bypass capacitor is
required for filtering the VCC5 voltage.
Bootstrap Circuitry
The uP6161 integrates MOSFET gate drives that are
powered from the PVCC9 pin and support 12V+12V driving
capability. A bootstrap diode is embedded to facilitates PCB
design and reduce the total BOM cost. Connect a ceramic
bootstrap diode between BOOT and PHASE pins to form a
bootstrap circuit for providing charge to turn on/off the upper
MOSFET. No external Schottky diode is required.
Converters that consist of uP6161 feature high efficiency
without special consideration on the selection of
MOSFETs.
Chip Enable and Frequency Setting
The RT/DIS is a multifunctional pin: chip shutdown and
frequency setting. Pulling low this pin to GND by an open
drain/collector transistor shuts down the uP6161 and
disables both buck and linear controllers.
The switching frequency is set by a resistor connecting to
the RT/DIS pin as:
fOSC
=
23500000
RRT
+
74000
(Hz)
Figure 2 shows the dependence between the resistor
chosen and the resulting switching frequency.
1000
+12V
VCC12
PVCC9
9V
Linear
Regulator
uP6161
Gate
Drivers
VCC9
5V
Linear
Regulator
POR
Monitoring
Control
Circuitry
Figure 1. Supply Voltage Configuration
Both PVCC9 and VCC9 are continuously monitored for
100
10
100
RRT (kohm)
1000
Figure 2. Switching Frequency vs. RRT
Soft Start
Once POR is acknowledged and RT/DIS pin is released,
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P00, File Name: uP6161-DS-P0001
5
5 Page 
www.datasheet4u.com
Preliminary
uP6161
Turn On Waveforms
SVOUT
(0.5V/Div)
LVOUT
(0.5V/Div)
Typical Operation Characteristics
Power On Waveforms
PVCC9
(5V/Div)
VCC12
(5V/Div)
SVOUT
(0.5V/Div)
RT/DIS
(0.5V/Div)
2.5ms/Div
PHASE
(10V/Div)
Gate Waveforms
LVOUT
(0.5V/Div)
5ms/Div
Gate Waveforms
UGATE
(5V/Div)
PHASE
(5V/Div)
UGATE-PHASE
(5V/Div)
LGATE
(5V/Div)
LGATE
(5V/Div)
UGATE
(5V/Div)
PHASE
(5V/Div)
UGATE-PHASE
(5V/Div)
25ns/Div
Over Current Protection
SVOUT
(0.5V/Div)
PHASE
(10V/Div)
IOUT
(10A/Div)
10ms/Div
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P00, File Name: uP6161-DS-P0001
25ns/Div
Trun Off Waveforms
RT/DIS
(1V/Div)
LDRV
(2V/Div)
PHASE
(10V/Div)
5us/Div
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet UP6161.PDF ] | |
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