switching regulator series step-down dc/dc converter ......1 sw1 pin header - 2.54mm × 3 contacts...
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© 2014 ROHM Co., Ltd. All rights reserved. www.rohm.com 9 December 2014 Rev.003
Switching Regulator Series Step-Down DC/DC Converter BD9E300EFJ Evaluation Board BD9E300EFJ-EVK-001
Description
BD9E300EFJ-EVK-001 Evaluation board delivers an output 5.0 volts from an input 7.2 to 33 volts using BD9E300EFJ, a
synchronous rectification step-down DC/DC converter integrated circuit, with output current rating of maximum 2.5A. The
output voltage can be set by changing the external parts of circuit and the loop-response characteristics also can be adjusted
by the phase compensation circuit.
Performance specification (These are representative values, and it is not a guaranteed against the characteristics.)
VIN = 24V, VOUT = 5.0V, Unless otherwise specified.
Parameter Min Typ Max Units Conditions
Input Voltage Range 7.0 36 V
Output Voltage 5.0 V R1=12kΩ, R2=3kΩ
Output Voltage Setting Range VIN×0.15 VIN×0.7 V
Output Current Range 0 2.5 A
Loop Band Width 31.6 kHz
Phase Margin 76.5 degrees
Input Ripple Voltage 100 mVpp IO = 2.5A
Output Ripple Voltage 30 mVpp IO = 2.5A
Output Rising Time 3.5 ms
Operating Frequency 1.0 MHz
Maximum Efficiency 84.7 % IO = 0.9A
(NOTE1) When the output voltage is 5.0V, it is 7.2V by limiting ratio of the maximum duty.
(NOTE2) When the output voltage is 5.0V, it is 33V by limiting ratio of the minimum duty.
(NOTE3) However, (VIN×0.15) ≥ 1.0V
(NOTE3)
(NOTE2)(NOTE1)
BD
© 2ww
Op 1. N
2. C
En
D9E300EF
2014 ROHM Coww.rohm.com
peration Pro
Necessary eq
(1) DC powe
(2) Maximum
(3) DC voltme
Connecting th
(1) DC powe(2) The max. (3) Check Ju(4) Connect p(5) Connect l(6) Connect p(7) Connect p(8) DC powe(9) IC is enab(10) Check D(11) The load(12) Check a
nable-Pin
To minimize EN pin(3pin)OFF-side terIt also can bvoltage betwoperation wh
DC Po
DC Voltmete
FJ-EVK-00
o., Ltd. All rights
ocedures
uipments
r-supply of 7.2
m 2.5A load
eter
he equipments
r-supply prese load should bmper pin of Spositive-terminload’s positivepositive-terminpositive-terminr-supply outpuble (EN) by shDC voltmeter 2d is enabled. at DC voltmete
current consu) of the IC. Sminal and norbe swithed be
ween EN and Ghen it is over 2
ower
r 1
+
-
+
-
V
01
reserved.
2V to 33V/2.5A
s
ets to 24V andbe set at 2.5A W1 is short, bnal of power-se-terminal to Vnal of DC voltmnal of DC voltmut is turned ONhorting Jumpe2 displays 5.0V
er 1 whether th
umption duringStandby-modermal-mode opeetween standbGND-terminal.2.5V.
A
d then the powand over it wi
between intermsupply to VIN+VOUT+terminameter 1 to TPmeter 2 to TP3N. r-pin of SW1 bV.
he voltage-dro
Figure 1
g standby-mode is enabled eration by shoby-mode and . Standby-mod
2/10
wer output turnll be disabled
mediate-termin+terminal and al and negative1 and negativ3 and negativ
between interm
op (loss) is not
1. Connection
de and normaby shorting
orting betweennormal-mode
de is enabled
ns off. . nal and OFF-snegative-terme-terminal to Ge-terminal to Te-terminal to T
mediate-termi
t caused by th
Diagram
al operation, EJumper-pin o
n intermediatee operation bwhen the vol
9
side terminal. minal to GND-teGND-terminal TP2 for input-vTP4 for output
nal and ON-si
he wire’s resist
Enable-mode of SW1 betwe-terminal and y removing Jtage of EN is
9 December
erminal with awith a pair of
voltage measut-voltage mea
ide terminal.
tance.
can be switcheen intermedON-side term
Jumper-pin anunder 0.8V, a
-
+
-
V
+
r 2014 Rev.0
a pair of wires.wires.
urement. surement.
hed by controliate-terminal
minal. nd controlling and normal-m
Load
DC VoltmV
003
.
lling and
the ode
meter 2
3/10
BD9E300EFJ-EVK-001
9 December 2014 Rev.003© 2014 ROHM Co., Ltd. All rights reserved. www.rohm.com
2 VIN
3 EN
1 BOOT
4 AGND
R3
C6S W1 O N
OFF
C2 C3 TP 1
V I N
GND
SW 8
C7
TP5L1
C4 C5
TP 3
VOUT
GND
FB 5
R2
R1
C8
U1
BD9E300EFJ-LB
COMP 6TP 2
C 1
R4
TP 4
9 E
P A
D
J 1
J 2
TP6
7 PGND
2 C1, C7 Ceramic Capacitor 0.1µF 50V, B, ±20% GRM188B31H104MA92 MURATA 1608
1 C2 Ceramic Capacitor 10µF 50V, B, ±10% GRM32EB31H106KA12 MURATA 3225
0 C3 Ceramic Capacitor - Not installed - - 3225
1 C4 Ceramic Capacitor 22µF 10V, B, ±10% GRM31CB31A226KE19 MURATA 3216
0 C5 Ceramic Capacitor - Not installed - - 3216
1 C6 Ceramic Capacitor 2200pF 50V, B, ±10% GRM188B11H222KA01 MURATA 1608
1 C8 Ceramic Capacitor 100pF 50V, CH, ±5% GRM1882C1H101JA01 MURATA 1608
1 L1 Inductor 4.7µH ±30%, DCR=26mΩmax, 4.1A CLF7045T-4R7N TDK 7269
1 R1 Resistor 12kΩ 1/10W, 50V, 1% MCR03ERPF1202 ROHM 1608
1 R2 Resistor 3kΩ 1/10W, 50V, 1% MCR03ERPF3001 ROHM 1608
1 R3 Resistor 15kΩ 1/10W, 50V, 1% MCR03ERPF1502 ROHM 1608
1 R4 Resistor 0Ω Jumper MCR03ERPJ000 ROHM 1608
1 SW1 Pin header - 2.54mm × 3 contacts PH-1x03SG USECONN -
1 U1 IC - Buck DC/DC Converter BD9E300EFJ-LB ROHM HTSOP-J8
2 J1, J2 Terminal Block - 2 contacts, 15A, 14 to 22AWG TB111-2-2-U-1-1Alphaplus
Connectors & Cables
-
1 - Jumper - Jumper pin for SW1 MJ254-6BK USECONN -
ReferenceDesignator
CountManufacturerPart Number
ManufacturerConfiguration
(mm)Type Value Description
Cricuit Diagram
VIN = 7.2V to 33V, VOUT = 5.0V
Figure 2. BD9E300EFJ-EVK-001 Circuit Diagram Bill of Materials
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BD9E300EFJ-EVK-001
9 December 2014 Rev.003© 2014 ROHM Co., Ltd. All rights reserved. www.rohm.com
Layout
Figure 3. Top Silk Screen (Top view)
Figure 4. Top Silk Screen and Layout (Top view)
5/10
BD9E300EFJ-EVK-001
9 December 2014 Rev.003© 2014 ROHM Co., Ltd. All rights reserved. www.rohm.com
Figure 5. Top Side Layout (Top view)
Figure 6. L2 Layout (Top view)
6/10
BD9E300EFJ-EVK-001
9 December 2014 Rev.003© 2014 ROHM Co., Ltd. All rights reserved. www.rohm.com
Figure 7. L3 Layout (Top view)
Figure 8. Bottom Side Layout (Top view)
BD
© 2ww
Effi
cien
cy(%
)O
utpu
tVol
tage
Cha
nge
(%)
D9E300EF
2014 ROHM Coww.rohm.com
0
10
20
30
40
50
60
70
80
90
100
0
Effi
cien
cy (
%)
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0
Out
put V
olta
ge C
hang
e (%
)
FJ-EVK-00
o., Ltd. All rights
0.5
Lo
0.5
Lo
Figure 9. Eff
Figure 11
01
reserved.
1 1.5
ad Current (A
VIN
VI
1 1.5
oad Current (A
fficiency vs Lo
1. Load Regula
2
A)
N=12V
N=24V
VO=5.0V
2
A)
VIN=12V
VIN=24V
VO=5.0V
ad Current
ation
7/10
2.5
Out
put V
olta
ge C
hang
e (%
)
2.5
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
5
pg
g(
)
VO (AC) 100mV/div
IO: 1A/div
IO: 1A/div
VO (AC) 100mV/div
9
10 15
Inpu
Figure
Figure 12. Lo
VIN = 12V VO = 5.0V
VIN = 24V VO = 5.0V
I
I
9 December
20 2
ut Voltage (V)
10. Line Regu
oad Transient
Time
IO: 0A→2.5A→
IO: 0A→2.5A→
Time
r 2014 Rev.0
5 30
IO=1.0A
ulation
Characteristic
e scale 1ms/d
→0A
→0A
e scale 1ms/d
003
35
cs
div
div
BD
© 2ww
D9E300EF
2014 ROHM Coww.rohm.com
Gai
n (d
B)
Gai
n (d
B)
FJ-EVK-00
o., Ltd. All rights
()
fC =PhaGa
()
fC =PhaGa
01
reserved.
Figu
Figu
= 25.1kHz ase margin = in margin = 21
= 31.6kHz ase margin = in margin = 20
ure 13. Loop R
ure 14. Loop R
82.0deg1.5dB
76.5deg0.5dB
8/10
Response VIN
Response VIN
Frequenc
Frequenc
= 12V, VO = 5
= 24V, VO = 5
cy (Hz)
Phase
Gain
cy (Hz)
Phase
Gain
9
.0V, IO = 2.5A
.0V, IO = 2.5A
e
9 Decemberr 2014 Rev.0
Pha
se (
deg
) P
hase
(d
eg)
003
BD
© 2ww
VIN
50
VIN
50
VO
50
VO
50
D9E300EF
2014 ROHM Coww.rohm.com
F
F
N (AC) 0mV/div
N (AC) 0mV/div
O (AC) 0mV/div
O (AC) 0mV/div
FJ-EVK-00
o., Ltd. All rights
Figure 15. InpV
Figure 17. OutpVIN
01
reserved.
put Voltage RipVIN = 12V, VO =
put Voltage Ri
N = 12V, VO =
Time sc
Time sc
Time sc
Time sc
pple Wave= 5.0V
ipple Wave5.0V
cale 500ns/div
cale 500ns/div
IO = 0A
IO = 2.5A
cale 500ns/div
cale 500ns/div
IO = 0A
IO = 2.5A
9/10
v
v
V5
V5
v
v
V5
V5
F
VIN (AC) 50mV/div
VIN (AC) 50mV/div
VO (AC) 50mV/div
VO (AC) 50mV/div
9
Figure 16. InpV
Figure 18. OuV
9 December
put Voltage RipVIN = 12V, VO =
utput Voltage RVIN = 24V, VO =
Time s
Time
Time s
Time s
r 2014 Rev.0
pple Wave= 5.0V
Ripple Wave= 5.0V
IO = 0A
IO = 2.5A
scale 500ns/d
scale 500ns/d
scale 500ns/d
scale 500ns/d
IO = 0A
IO = 2.5A
003
div
div
div
div
BD
© 2ww
D9E300EF
2014 ROHM Coww.rohm.com
VIN
5V/
EN5V/
VO
2V/
VIN
10V
EN10V
VO
2V/
VIN
5V/
EN5V/
VO
2V/
VIN
10V
EN10V
VO
2V/
FJ-EVK-00
o., Ltd. All rights
Figure
Figure
Figure
Figure
/div
/div
/div
V/div
V/div
/div
/div
/div
/div
V/div
V/div
/div
01
reserved.
19. Start-up EVIN = 12V
e 23. Start-up VIN = 12V
21. Start-up EVIN = 24V
e 25. Start-up VIN = 24V
EN = VIN V, VO = 5.0V, IO
by EN V, VO = 5.0V, IO
EN = VIN V, VO = 5.0V, IO
by EN V, VO = 5.0V, IO
Time scale
Time scale
Time scale
Time scale
10/10
O = 0A
O = 0A
O = 0A
O = 0A
1ms/div
1ms/div
1ms/div
1ms/div
Figure 20. PV
Figure 24. PV
Figure 22. PV
Figure 26. PV
9
ower-down ENIN = 12V, VO =
Power-down byIN = 12V, VO =
ower-down ENIN = 24V, VO =
Power-down byIN = 24V, VO =
Time
Time
Time s
Time s
9 December
N = VIN = 5.0V, IO = 0A
y EN = 5.0V, IO = 0A
N = VIN = 5.0V, IO = 0A
y EN = 5.0V, IO = 0A
e scale 1ms/
e scale 1ms/
scale 500ms/
scale 500ms/
r 2014 Rev.0
A
A
A
A
/div
/div
/div
/div
003
R1102Awww.rohm.com© 2014 ROHM Co., Ltd. All rights reserved.
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