4
Features: EVAL-RHRICL1ALV1, latched mode
4.1
Getting started
The EVAL-RHRICL1ALV1 evaluation board is customized to allow the test of latched operative mode of the
RHRPMICL1A integrated current limiter (ICL).
In the latched mode, if the duration of the overcurrent event is greater than the trip-off time T
ON
, the device
remains in current limitation for the T
ON
interval, then the external MOSFET is latched OFF until a reset is given
through either the telecommand interface or a UVLO activation/deactivation cycle. Depending on the SET_STS
pin logic status the device can be programmed to start up in latched-on or latched-off mode.
The configuration pins of the ICL in this mode of operation are the following:
•
Telecommand interface: enabled
•
SET_STS is connected to V
CC
(latched-on) or GND (latched-off) through the switch SW1
•
SET_FLB is shorted to GND
•
TON is connected to C
ON
•
TOFF is connected to GND
The external components of the board are pre-set to accomplish the following features:
•
V
CC
= 37 V with V
TH_ON
= 32 V and V
TH_OFF
= 30 V
•
HYS = 2 V
•
I
LIM
= 2 A
•
T
ON
˜ 10 ms
•
TC_ON and TC_OFF are available on TC3 connector
•
SET_STS can be connected to V
CC
or GND through the switch SW1
The evaluation board schematic is shown below. Please note that the capacitor Csns_1, connected in parallel to
the R
SENSE
, affects the dynamic of the reaction time and therefore the decision whether to mount it or not is up to
the application needs of the end user.
Figure 12.
Latched evaluation board schematic
U1
CFLAT20
1 2
3 4 5 6 7 8 9 10
11
17
18
19
20
16 1
5
14 13
12
V
D
_1
T
C
_ON
P-ch1
STRH40P10
0
C1
4.7uF
Rv_1
220k
Rsns_1
50m
VCC+_1
CN1
1
2
CN2
1
2
C3
4.7uF
0
CVcc_1_btm
4.7 uF
Rir_1
100k
RGND_1
8.25k
Con_1
100 nF
I_STM+_1
I_STM- _1
Rtms+_1
5k
Rtms-_1
5k
IS
N
S+
_
1
IS
N
S
-
_
1
VCC-_1
VCC+_1
VCC-_1
Ccomp_1
2.2 nF
LA
T
CH
IN
G
M
OD
E
CO
M
P_
1
V
D
_1
1
3
SW1
2
CVcc_1
100nF
VCC+_1
LATCHED ON
LATCHED OFF
SE
T
_F
L
B
SET_STS
TC_OFF
I_
R
E
F
T_
O
N
T_
O
F
F
ST
S
IC
L
_G
N
D
Rsts_1
50k
T
M
Rtm_1
100k
0
UV
L
O
V
G
HY
S
HYS
UVLO
VC
C
Rg_1
4R7
Csts_1
4.7 pF
Rtc_on_1
50K
Rtc_off_1
50K
S
CH1
S
T
PS
315
0
Rcomp_1
1k
Ctm_1
4.7 pF
C2
4.7uF
C4
4.7uF
Csns_1
1uF
Rhys_1
1.58k
Ruvlo_1
18.7k
N-CH1
STN1NF10
N-CH2
STN1NF10
Rg_on
1k
Rg_off
1k
TC3
1
2
3
0
TC_ON
TC_OFF
ZD1
1SMB5929BT3G
UM2605
Features: EVAL-RHRICL1ALV1, latched mode
UM2605
-
Rev 1
page 12/27