Datasheet

DocID9453 Rev 2 9/32
L6227 Electrical characteristics
32
Figure 3. Switching characteristic definition
PWM comparator and monostable
I
RCA,
I
RCB
Source current at pins RC
A
and RC
B
V
RCA
= V
RCB
= 2.5 V 3.5 5.5 mA
V
offset
Offset voltage on sense comparator V
REFA,
V
REFB
= 0.5 V ±5 mV
t
PROP
Turn OFF propagation delay
(3)
500 ns
t
BLANK
Internal blanking time on SENSE pins 1 µs
t
ON(MIN)
Minimum On time 2.5 3 µs
t
OFF
PWM recirculation time
R
OFF
= 20 KC
OFF
= 1 nF 13 µs
R
OFF
= 100 KC
OFF
= 1 nF 61 µs
I
BIAS
Input bias current at pins VREF
A
and
VREF
B
10 µA
Overcurrent protection
I
SOVER
Input supply overcurrent protection
threshold
T
j
= -25 °C to 125 °C
(1)
2 2.8 3.55 A
R
OPDR
Open drain ON resistance I = 4 mA 40 60 W
t
OCD(ON)
OCD turn-on delay time
(4)
I = 4 mA; C
EN
< 100 pF 200 ns
t
OCD(OFF)
OCD turn-off delay time
(4)
I = 4 mA; C
EN
< 100 pF 100 ns
1. Tested at 25 °C in a restricted range and guaranteed by characterization.
2. See Figure 3: Switching characteristic definition.
3. Measured applying a voltage of 1 V to pin SENSE and a voltage drop from 2 V to 0 V to pin VREF.
4. See Figure 4: Overcurrent detection timing definition.
Table 5. Electrical characteristics
(T
amb
= 25 °C, V
s
= 48 V, unless otherwise specified) (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
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