No. 5505-2/7
LB1845
Parameter Symbol Conditions
Ratings
Unit
min typ max
[Output Block]
Output stage supply voltage
I
BB ON
12 16 mA
I
BB OFF
0.7 0.9 mA
V
O
(sat)1 IO= +1.0 A sink 1.2 1.4 V
Output saturation voltage 1
V
O
(sat)2 IO= +1.5 A sink 1.4 1.7 V
V
O
(sat)3 IO= –1.0 A source 1.1 1.3 V
V
O
(sat)4 IO= –1.5 A source 1.3 1.6 V
Output leakage current
I
O
(leak)1 VO= VBBsink 50 µA
I
O
(leak)2 VO= 0 V source –50 µA
Sustained output voltage V(sus) * 45 V
[Logic Block]
Logic supply current
I
CC ON
I0 = 0.8 V, I1 = 0.8 V 19.5 25.3 mA
I
CC OFF
I0 = 2.4 V, I1 = 2.4 V 15.5 20.1 mA
Input voltage
V
IH
2.4 V
V
IL
0.8 V
Input current
I
IH
VIH= 2.4 V 10 µA
I
IL
VIL= 0.8 V –10 µA
I0 = 0.8 V, I1 = 0.8 V 9.5 10 10.5
Current control threshold voltage V
REF/VSENSE
I0 = 2.4 V, I1 = 0.8 V 13.5 15 16.5
I0 = 0.8 V, I1 = 2.4 V 25.5 30 34.5
Thermal shutdown temperature T
S
170 °C
Electrical Characteristics at Ta = 25°C, VBB= 38 V, VCC= 5 V, V
REF
= 5 V
Truth Table
Pin Assignment
Note: *Design guaranteed value
Note: Outputs go off when ENABLE is high or in the I0 = I1 = high state.
ENABLE PHASE OUT A OUT B
L H H L
L L L H
H — OFF OFF
I0 I1 Output current
L L V
REF
/ (10 × RE) = I
OUT
H L V
REF
/ (15 × RE) = I
OUT
× 2/3
L H V
REF
/ (30 × RE) = I
OUT
× 1/3
H H 0