BD9745EKN Datasheet, PDF (3/22 Pages) Rohm – Silicon Monolithic Integrated Circuit

3/21
○Electrical characteristics（Ta=25℃，VBAT=3V, VCC=5V, RT=62kohm, STB1～7=3V）
Parameter
Symbol
Min.
Spec.
Typ.
Max
Units
Conditions.
【 Reference Voltage for CH5 】
Reference Voltage
Vref5
0.99 1.00 1.01
V STB5=3V
Line Regulation
DVLi
-
4.0 12.5 mV Vcc=2.8V～5.5V
Load Regulation
DVLo
-
1.0
7.5 mV Iref=10μA～100μA
Short Circuit Output Current Ios
0.2
1
-
mA Vref=0V
【 Internal Regulator 】
REGA Output Voltage
VREGA
2.4
2.5
2.6
V Ireg=5mA
【 Low Voltage Input Prevented Operation Faults Circuit 】
Threshold Voltage 2
Vstd2
2.3
2.4
2.5
V VCC monitor
Hysteresis width 2
ΔVst2
100
200
300 mV
Threshold Voltage 3
Vstd3
1.6
2.0
2.3
V VREGA monitor
Hysteresis width 3
ΔVst3
100
200
300 mV
【 Start up Circuit 】
Oscillator Frequency
Fstart
150
300
600 kHz
Minimum VBAT Voltage
Vst1
1.5
-
-
V
Soft-start time
Tss1
2.6
4.2
7.4 msec
【 Soft-Start 】
Soft-start time
(CH2～4,CH6,7)
Soft-start time CH5
Tss4
6.8
8.5 10.2 msec
Tss3
5.8
7.7
9.6 msec VREF5monitor
【 Protection Circuit 】
Timer Start
Voltage
Timer Start
Voltage
Threshold
Threshold
Vtcfb
Vtcinv
2.1
2.2
2.3
0.56 0.64 0.72
V
Error Amp Output monitor
CH1,5～7
V
INV monitor
CH2～4
SCP Standby Voltage
Vssc
-
22
170 mV
SCP Output Current
Iscp
2
4
6
μA VSCP=0.1V
SCP Threshold Voltage
Vscp
0.9
1.0
1.1
V
【 Triangular wave oscillator 】
Oscillator Frequency
CH1～4
Oscillator Frequency
CH5～7
ｆosc1
1.0
1.2
1.4 MHz RT=62kohm
ｆosc2
500
600
700 kHz RT=62kohm
【 Error Amp 】
Input Bias Current
Iinv
-5
0
5
μA INV1~4,6,7,7I,NON5=7.0V
INV Threshold
VINV
0.79 0.80 0.81
V CH1～4,CH6,7V
NON5 Threshold
VINV5
-12
0
12 mV CH5
INV7I Threshold
VINV7I
380
400
420 mV CH7I
Test
Circuit
【 PWM Comparator 】
MAX DUTY1, 2,3,4
Dmax2
86
92
97
%
MAX DUTY5, 6,7
Dmax4
77
85
93
%
◎This product is not designed for normal operation within a radioactive environment.
REV. D