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BD90620HFP-C 데이터시트 PDF




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부품번호 BD90620HFP-C 기능
기능 1ch Step-Down Switching Regulator
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BD90620HFP-C 데이터시트, 핀배열, 회로
Datasheet
Input Voltage 3.5 V to 36 V
Output SW Current 4 A / 2.5A / 1.25A
1ch Step-Down Switching Regulator
BD906xx series
General Description
BD906xx series is a step-down switching regulator with
integrated POWER MOS FET and have the capability to
withstand high input voltage, providing a free setting
function of operating frequency with external resistor.
This switching regulator features a wide input voltage
range (3.5V to 36V, Absolute maximum 42V) and
operating temperature range (-40 °C to +125 °C).
Furthermore, an external synchronization input pin
enables synchronous operation with external clock.
Features
Integrated Pch POWER MOS FET
Low Dropout: 100 % ON Duty Cycle
External Synchronization Enabled
Soft Start Function: 1.38 ms (f = 500 kHz)
Current Mode Control
Over Current Protection
Low Supply Voltage Error Prevention
Thermal Shut Down Protection
Short Circuit Protection
High power HRP7 package mounted
Compact and High power HTSOP-J8 package
mounted
AEC-Q100 Qualified
Load dump up to 42V.
Applications
Automotive Battery Powered Supplies
(Cluster Panels, Car Multimedia)
Industrial / Consumer Supplies
Other electronic equipment
Key Specifications
Input Voltage Range:
3.5 V to 36 V
(Initial startup is over 3.9 V)
Output Voltage Range:
0.8V to VIN
Output Switch Current:
4 A / 2.5 A / 1.25 A (Max)
Switching Frequency:
50 kHz to 600 kHz
Reference Voltage Accuracy: ±2% (-40 °C to +125 °C)
Shutdown Circuit Current:
0 µA (Typ)
Operating Temperature Range: -40 °C to +125 °C
Package
HRP7
HTSOP-J8
W(Typ) x D(Typ) x H(Max)
9.395mm x 10.540mm x 2.005mm
4.90 mm x 6.00 mm x 1.00 mm
HRP7
HTSOP-J8
Typical Application Circuit
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
CVTSZ2211114001
This product has no designed protection against radioactive rays
1/34
TSZ02201-0T1T0AL00130-1-2
21.Nov.2014 Rev.004




BD90620HFP-C pdf, 반도체, 판매, 대치품
BD906xx series
Datasheet
Description of Blocks
ERROR-AMP
The ERROR-AMP block is an error amplifier and its inputs are the reference voltage 0.8 V (Typ) and the “FB” pin voltage.
(Refer to recommended examples on p.16 to 17). The output “VC” pin controls the switching duty, the output voltage is
set by “FB” pin with external resistors. Moreover, the external resistor and capacitor are required to COMP pin as phase
compensation circuit (Refer to phase compensation setting method on p.16 to 17).
SOFT START
The function of the SOFT START block is to prevent the overshoot of the output voltage VO through gradually increasing
the input of the error amplifier when the power supply turns ON, which also results to the gradual increase of the
switching duty. The soft start time is set to 1.38 ms (f = 500 kHz).
The soft start time is changed by setting of the switching frequency. (Refer to p.17)
EN / SYNC
The IC is in normal operation when the voltage on the “EN / SYNC” pin is more than 2.6V. The IC is shut down when the
voltage on the “EN / SYNC” pin is less than 0.8V. Furthermore, external synchronization is possible when pulses are
applied to the “EN / SYNC” pin. The frequency range of the external synchronization is within ±20 % of the oscillation
frequency and is limited by the external resistance connected to the RT pin.
ex) When RRT is 27 k(f = 500 kHz), the frequency range of the external synchronization is 400 kHz to 600 kHz.
OSC (Oscillator)
This circuit generates the clock pulses that are input to SLOPE block. The oscillation frequency is determined by the
current going through the external resistor RT at constant voltage of ca. 0.8V. The frequency can be set in the range
between 50kHz to 600kHz (Refer to p.16 Figure 13). The output of the OSC block send clock signals to PWM_LATCH.
Moreover the generated pulses of the OSC block are also used as clock of the counter of SS and SCP_LATCH blocks.
SLOPE
This block generates saw tooth waves using the clock generated by the OSC block. The generated saw tooth waves are
combined with the current sense and sent to the CUR_COMP.
CUR_COMP (Current Comparator)
The CUR_COMP block compares the signals between the “VC” pin and the combined signals from the SLOPE block and
current sense. The output signals are sent to the PWM_LATCH block.
PWM_LATCH
The PWM_LATCH block is a LATCH circuit. The OSC block output (set) and CUR_COMP block output (reset) are the
inputs of this block. The PWM_LATCH block outputs PWM signals.
TSD (Thermal Shutdown)
The TSD block prevents thermal destruction / thermal runaway of the IC by turning OFF the output when the temperature
of the chip reaches more than 150 °C. When the chip temperature falls to a specified level, the switching will resume.
However, since the TSD is designed to protect the IC, the chip temperature should be provided with the thermal
shutdown detection temperature of less than approximately 150 °C.
OCP (Over Current Protection)
OCP is activated when the voltage between the drain and source (on-resistance × load current) of the P-ch POWER
MOSFET when it is ON, exceeds the reference voltage which is internally set within the IC. This OCP is a self-return type.
When OCP is activated, the duty will be small, and the output voltage will decrease. However, this protection circuit is
only effective in preventing destruction from sudden accident. It does not support the continuous operation of the
protection circuit (e.g. if a load, which significantly exceeds the output current capacitance, is connected).
SCP (Short Circuit Protection) and SCP-LATCH
While OCP is activated, and if the output voltage falls below 70 %, SCP will be activated. When SCP is active, the output
will be turned OFF after a period of 1024 pulse. It extends the time that the output is OFF to reduce the average output
current. In addition, during start-up of the IC, this feature is masked until it reaches a certain output voltage to prevent the
start-up failure.
UVLO (Under Voltage Lock-Out)
UVLO is a protection circuit that prevents low voltage malfunction. It prevents malfunction of the internal circuit from
sudden rise and fall of power supply voltage. It monitors the VIN power supply voltage and the internal regulator voltage. If
VIN is less than the threshold voltage 3.24 V (Typ), the Pch POWER MOS FET output is OFF and the soft-start circuit will
be restarted. This threshold voltage has a hysteresis of 280 mV (Typ).
DRV (Driver)
This circuit drives the gate electrode of the Pch POWER MOS FET output. It reduces the increase of the Pch POWER
MOS FET’s on-resistance by switching the driving voltage when the power supply voltage drop.
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/34
TSZ02201-0T1T0AL00130-1-2
21.Nov.2014 Rev.004

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BD90620HFP-C 전자부품, 판매, 대치품
BD906xx series
Typical Performance Curves
Datasheet
4.0
3.5
3.0 From Top
Ta = 125 °C
2.5 Ta = 25 °C
Ta = -40 °C
2.0
1.5
1.0
0.5
0.0
0
5 10 15 20 25 30 35
Input Voltage : VIN [V]
Figure 1. Shutdown Circuit Current vs Input Voltage
40
4.0
3.5
3.0
2.5
2.0
1.5
1.0 上から
Ta = 125 °C
0.5
Ta = 25 °C
Ta = -40 °C
0.0
0
5 10 15 20 25 30 35
Input Voltage : VIN [V]
Figure 2. Circuit Current vs Input Voltage
40
0.30
0.25
0.20
0.15
0.10
0.05
From Top
VIN = 3.5V
VIN = 13.2V
0.00
-40 -20 0 20 40 60 80 100 120
Ambient Temperature : Ta [˚C]
Figure 3. POWER MOSFET ON Resistance vs
Ambient Temperature
10
9
8
7
6
5
4
3
2
1
0
0
From Top
BD90640HFP/EFJ-C
BD90620HFP/EFJ-C
BD90610EFJ-C
Ta = 25 °C
5 10 15 20 25 30 35 40
Input Voltage : VIN [V]
Figure 4. Switch Current Limit vs Input Voltage
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/34
TSZ02201-0T1T0AL00130-1-2
21.Nov.2014 Rev.004

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부품번호상세설명 및 기능제조사
BD90620HFP-C

1ch Step-Down Switching Regulator

ROHM Semiconductor
ROHM Semiconductor

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