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PDF BD9610AMUV Data sheet ( Hoja de datos )
| Número de pieza | BD9610AMUV | |
| Descripción | 60V Synchronous Step-down Switching Regulator | |
| Fabricantes | ROHM Semiconductor | |
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High Performance Switching Regulator Series
60V Synchronous Step-down
Switching Regulator(Controller type)
BD9610AMUV
●General Description
The BD9610AMUV is a family of high resistance and
wide-input voltage (10V to 56V), synchronous,
step-down switching regulator. BD9610AMUV offers
design flexibility with a variety of user-programmable
functions, including soft-start, operating frequency,
high-side current limit, and loop compensation.
BD9610AMUV uses the pulse-width modulation
method of the voltage mode, and drives 2 external
Nch-FETs. The externally programmable current limit
provides pulse-by-pulse current limit, as well as
hiccup mode operation utilizing an internal fault
counter for longer duration overloads.BD9610AMUV
is safe for pre-biased outputs, not turning on the
synchronous rectifier until the high-side FET has
already started switching
●Features
■ High Resistance and Wide Range Input
Voltage :VCC=10V~56V
■ Internal Outside FET Gate Driver:REG10=10V
■ 0.8V±1.0% Reference Voltage Accuracy
■ Safe for Pre-biased Outputs
■ Adjustable Oscillating Frequency and Soft-Start
■ Master/Slave Synchronize Function
■ Over Current Protection (OCP)
■ Under Voltage Locked Output(UVLO)
■ Thermal Shut-down(TSD)
●Key Specifications
■ Input Supply Voltage
■ Output Voltage
■ Reference Voltage Accuracy
■ Gate Drive Voltage(REG10)
■ Frequency
10~56 [V]
1.0~(Vin×0.8) [V]
±1.0 [%]
9~11 [V]
50~500 [kHz]
●Package
VQFN020V4040
4.00 ㎜×4.00 ㎜×1.00 ㎜
●Applications
■ Amusement machines
■ FA Equipments
■ OA Equipments
■ LED Lighting Equipments
■ General Equipments used 24V,48V Bus line
●Typical Application Circuit
Vo
140kΩ
10kΩ
FB
1kΩ 11kΩ
180pF 4700pF
INV
SS
0.01μF
REG5
0.1μF
RTSS
0.01μF
RT
75kΩ
SYNC
CLKOUT
ON/OFF 1μF
CTL
VCC
CLH
CLL
RCL
20kΩ
BST
10μF×4
5mΩ
VIN
VIN
=15-56V
HG
BD9610AMUV
0.47μF
LX
REG10
Nch
SUD23N06-31L
(Vishay Siliconix)
Vo
10μF×4
VOUT
=12V
5μH
(DCR=3mΩ)
220μF
LG
1μF
Nch
SUD23N06-31L
(Vishay Siliconix)
●A Type of Efficiency
η=95%
(Vin=34V,Io=10A,fosc=250kHz)
100
90
80
70
60 Vin=34V,Vo=12V
50
0 5 10 15
Iout [A]
GND
PGND
○STRUCURE：Silicon Monolithic Integrated Circuit ○Not designed to withstand radiation.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
1/27
TSZ02201-0Q1Q0AJ00010-1-2
24.OCT.2014 Rev.002
1 page  
BD9610AMUV
●Electrical Characteristics
(Unless otherwise specified, Ta=25℃,VCC=CTL=24V,RT=200kΩ)
PARAMETER
【OSCILLATOR】
Frequency
RTSS maximum current
(sink/source)
RTSS pre-charge threshold
RTSS pre-charge current
【SOFT START】
SS source current
【UVLO】
UVLO threshold (VCC)
UVLO threshold (REG10)
UVLO threshold (REG5)
UVLO hysteresis (VCC)
UVLO hysteresis (REG10)
UVLO hysteresis (REG5)
【ERROR AMPLIFIER】
Reference voltage
INV input bias current
FB max. voltage
FB min. voltage
FB sink current
FB source current
【PWM COMPARATOR】
Input threshold voltage
HG min. OFF pulse width
【OUTPUT DRIVER】
Output driver PchFET Ron
Output driver NchFET Ron
SYMBOL
MIN
FOSC
IRTSS
VRTSSTH
IRTSSP
ISSSO
93
2.5
0.40
50
0.7
VUTHVCC
VUTHR10
VUTHR5
VUHSVCC
VUHSR10
VUHSR5
8.5
7.9
4.2
-
-
-
VNON
IBINV
VFBH
VFBL
IFBSI
IFBSO
0.792
-
REG5-0.5
-
0.5
60
VT0
HGmin
1.4
150
RONH
RONL
-
-
LIMIT
TYP
100
5
0.45
100
1
9.0
8.7
4.5
0.5
0.5
0.2
0.8
0.01
-
0
2
120
1.5
350
6
1
MAX
UNIT
CONDITION
107 kHz RT=200kΩ
10 uA VRTSS=0.48V/1.0V
0.50 V
200 uA VRTSS=0.3V
1.3 μA SS=1.0V
9.5 V VCC rise-up
9.5 V REG10 rise-up
4.8 V REG5 rise-up
1.0 V VCC pin
1.0 V REG10 pin
0.4 V REG5 pin
0.808
1.0
REG5
0.5
-
-
V INV=FB
μA INV=0.8V
V
V
mA FB=1.25V , INV=1.5V
μA FB=1.25V , INV=0V
1.6 V 0% Duty ,FB pin vol.
600 ns FB=3V
10 Ω Iout=0.1A
3 Ω Iout=0.1A
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
5/27
TSZ02201-0Q1Q0AJ00010-1-2
24.OCT.2014 Rev.002
5 Page 
BD9610AMUV
●Function Description
(1)REG5 REGULATOR
It is used for internal power supply and the reference voltage. It can load more less than 2mA.
Please connect a ceramic capacitor (CREG5=0.1uF) between REG5 and GND.
(2)REG10 REGULATOR
This is a regulator for a low side DRV and charge the BST-LX capacitor through the internal FET switch. Please
connect a ceramic capacitor (CREG10=1.0uF) between REG10 and GND.
This regulator limites load current about 20mA, When REG10 pin short to GND. Because of this function,
(3)SOFT START
For preventing rush current or overshoot, The reference voltage should be ramped startup.
The reference voltage used for the startup is derived in the following manner. A capacitor (CSS) is connected to
the SS pin. There is a ramped voltage generated at this pin be charging CSS with a source current (ISS=1uA).
The soft-start time is decided by the time to reach SS voltage to 0.8V.
tss = (CSS×VNON) / ISS
(ex.)CSS=0.01uF
tss = (0.01u×0.8)/1u = 8 [ms]
Before the beginning of soft start, It takes the start-up time for RTSS described next state.
(4)OSCILLATOR (RT、RTSS、CLKOUT)
The switching frequency of the oscillator is set by a single resistor RRT to ground.
The clock frequency is related to RRT by the following equation and the relationship is charted in fig.26
The amplitude of the triangle wave of the oscillator is 1.5V-2.0V.
FOSC = 1 / ( 50e-6 × RRT ) [kHz]
1000
（RRT: RT resister [kΩ]）
100
10
10
100
RRT (kΩ)
1000
Fig.26 Switching frequency
vs
RRT resistance
The case of not using the synchronizing to an external supply, the RTSS terminal outputs the internal reference
voltage (0.5V) through the internal voltage buffer. And the RT terminal is the buffer of the RTSS voltage. A 0.01uF
ceramic capacitor should be connected from this RTSS to ground.
When the UVLO is going to be released, the RTSS pin is quickly charged up to VRTSS=0.45V by the source current
(IRTSS=100uA) as a pre-charge function, because CRTSS is discharged during UVLO.
If the voltage of RTSS pin is reached to 0.45V, the UVLO is released and soft start function is started.
It takes this charging time for start-up of DC/DC to begin charging the CSS.
(ex.)CRTSS=0.01uF
TRTSS= (0.01uF×0.50V) / 100uA = 50 [us]
The CLKOUT pin outputs a square wave which synchronized to internal oscillator for a clock of master-slave
synchronizing function.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
11/27
TSZ02201-0Q1Q0AJ00010-1-2
24.OCT.2014 Rev.002
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet BD9610AMUV.PDF ] | |
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