Datasheet

LMD18245
SNVS110E –APRIL 1998–REVISED APRIL 2013 www.ti.com
Electrical Characteristics
(1)
(continued)
The following specifications apply for V
CC
= +42V, unless otherwise stated. Boldface limits apply over the operating
temperature range, −40°C ≤ T
J
≤ +125°C. All other limits apply for T
A
= T
J
= 25°C.
Typical
(2)
Limit
(2)
Units
Symbol Parameter Conditions
(Limits)
DIGITAL-TO-ANALOG CONVERTER (DAC)
Resolution 4 Bits (min)
Monotonicity 4 Bits (min)
Total Unadjusted Error 0.125 0.25 LSB (max)
0.5 LSB (max)
Propagation Delay 50 ns
I
REF
DAC REF Input Current DAC REF = +5V −0.5 μA
±10 μA (max)
COMPARATOR AND MONOSTABLE
Comparator High Output Level 6.27 V
Comparator Low Output Level 88 mV
Comparator Output Current
Source 0.2 mA
Sink 3.2 mA
t
DELAY
Monostable Turn OFF Delay
(5)
1.2 μs
2.0 μs (max)
PROTECTION AND PACKAGE THERMAL RESISTANCES
Undervoltage Lockout, V
CC
5 V (min)
8 V (max)
T
JSD
Shutdown Temperature, T
J
155 °C
Package Thermal Resistances
θ
JC
Junction-to-Case, TO-220 1.5 °C/W
θ
JA
Junction-to-Ambient, TO-220 35 °C/W
LOGIC INPUTS
V
IL
Low Level Input Voltage −0.1 V (min)
0.8 V (max)
V
IH
High Level Input Voltage 2 V (min)
12 V (max)
I
IN
Input Current V
IN
= 0V or 12V ±10 μA (max)
(5) Turn OFF delay, t
DELAY
, is defined as the time from the voltage at the output of the current sense amplifier reaching the DAC output
voltage to the lower DMOS switch beginning to turn OFF. With V
CC
= 32V, DIRECTION high, and 200Ω connected between OUT1 and
V
CC
, the voltage at RC is increased from 0V to 5V at 1.2V/μs, and t
DELAY
is measured as the time from the voltage at RC reaching 2V to
the time the voltage at OUT 1 reaches 3V.
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