bd9842fv ROHM Co. Ltd., bd9842fv Datasheet - Page 4

• Manufacturer Part Number: bd9842fv
• Description: Dual-output High Voltage High-frequency Step-down Switching Regulator Controller Type
• Manufacturer: ROHM Co. Ltd.

● Reference data
Fig.10 Error amplifier reference voltage
Fig.7 UVLO threshold temperature
Fig.16 Oscillation frequency
3.5
3.4
3.3
3.2
3.1
2.9
2.8
2.7
2.6
2.5
1.008
1.006
1.004
1.002
0.998
0.996
0.994
0.992
120
110
100
temperature characteristics
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
1.01
0.99
90
80
3
-50
Fig.13 SS source current
-50
1
temperature characteristics
0
-50
0.2
-25
-25
Ambient Temperature: Ta(°C)
Ambient Temperature: Ta(°C)
-25
Ambient Temperature: Ta(°C)
characteristics
0.4
0
SS Voltage: VSS(V)
0
0
0.6
VCC=6.0V
25
VCC=6V
25
VCC=6V
25
0.8
50
50
50
1
CCP=1800pF
75
75
75
1.2
100
100
100
1.4
125
125
125
1.6
100
Fig.17 DT bias current
-20
Fig.14 SS sink current
80
60
40
20
140
120
100
7
6
5
4
3
2
1
0
Fig.11 FB output source current
0
80
60
40
20
0
0
35
30
25
20
15
10
100
Fig.8 Error amplifier I/O
5
0
0
0
Ta=85°C
Ta=85°C
0.5
1K
Ta=-40°C
ErrAmp Output Voltage: VFB(V)
Gain
characteristics
Ta=25°C
DT Input Voltage: VDT(V)
Frequency [Hz]
1
0.5
4/15
Ta=-40°C
SS Voltage: VSS(V)
10K
Gain
Ta=25°C
VCC=6.0V
Ta=25°C
1
100K
2
Phase
1
VCC=6.0V
1.5
Phase
1M
VCC=6.0V
1.5
3
2
10M
0
-45
-90
-135
-180
-225
-270
2.5
2
4
Fig.9 Error amplifier input current
Fig.12 FB output sink current
7
6
5
4
3
2
1
0
-0.5
5
4
3
2
1
0
0
temperature characteristics
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-50
Fig.15 SS source current
0
Fig.18 DT sink current
0
Ta=85°C
0.2
-25
0.5
Ambient Temperature: Ta(°C)
Ta=-40°C
ErrAmp Output Voltage: VFB(V)
Ta=25°C
ErrAmp Input Voltage: VINV(V)
DT Input Voltage: VDT(V)
0.4
Ta=25°C
0.5
0
0.6
Ta=-40°C
1
Ta=85°C
0.8
VCC=6V
Ta=25℃
25
1
1
50
1.5
1.2
VCC=6.0V
VCC=6.0V
VCC=6.0V
1.4
75
1.5
1.6
2
100
1.8
2
125
2.5
2