Current Controller. BD18345EFV-M Datasheet

BD18345EFV-M Controller. Datasheet pdf. Equivalent

BD18345EFV-M Datasheet
Recommendation BD18345EFV-M Datasheet
Part BD18345EFV-M
Description Constant Current Controller
Feature BD18345EFV-M; Datasheet Constant Current LED Drivers Constant Current Controller for Automotive LED Lamps BD1834.
Manufacture ROHM
Datasheet
Download BD18345EFV-M Datasheet




ROHM BD18345EFV-M
Datasheet
Constant Current LED Drivers
Constant Current Controller
for Automotive LED Lamps
BD18345EFV-M
General Description
BD18345EFV-M is 70 V-withstanding constant current
controller for automotive LED lamps. It is able to drive at
maximum 10 rows of PNP transistors. It can also
contribute to reduction in the consumption power of the
set as it has the built-in standby function. The IC provides
high reliability because it has two Current de-rating
function, LED open detection, short circuit protection,
over voltage mute function and LED failure input/output
function.
Features
AEC-Q100 Qualified(Note 1)
PWM Dimming Function
PWM Signal Output
LED Current DC Dimming
Thermal De-rating Function
LED Open Detection
Short Circuit Protection (SCP)
Over Voltage Mute Function (OVM)
Disable LED Open Detection Function
at Reduced-Voltage
LED Failure Input/Output Functions (PBUS)
(Note 1) Grade1
Key Specifications
Input Voltage Range:
FB Pin Voltage Accuracy:
4.5 V to 19.0 V
650 mV ±3 %
@Ta=25 °C to 125 °C
Stand-by Current:
LED Current De-rating Accuracy:
0 µA (Typ)
DCDIM Pin : ±3 % @VDCDIM=0.75 V to 2.00 V
THD Pin : ±6 % @VTHD=0.50 V to 0.75 V
Operating Temperature Range: -40 °C to +125 °C
Package
HTSSOP-B20
W (Typ) x D (Typ) x H (Max)
6.50 mm x 6.40 mm x 1.00 mm
HTSSOP-B20
Applications
Automotive LED Exterior Lamp
(Rear Lamp, Turn Lamp, DRL/Position Lamp, Fog
Lamp etc.)
Automotive LED Interior Lamp
(Air Conditioner Lamp, Interior Lamp, Cluster Light
etc.)
Typical Application Circuit
PWM_in
D1
ZD1
D2
CVIN1 CVIN2
DC_in D3
CCRT
RCRT
RDCIN
CD
VIN
EN
FB
BASE
RFB1
RFB2
RLIM
CRT
OP
DISC
D
SCP
BD18345EFV-M
VREG
CVREG
PWMOUT
PBUS
GND
DCDIM
OPM
THD
ROPM
CLED
RDCDIM1
RDCDIM2
RTHD
NTC
Product structure : Silicon integrated circuit
www.rohm.com
©2018 ROHM Co., Ltd. All rights reserved.
TSZ22111 14 001
This product has no designed protection against radioactive rays
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TSZ02201-0T3T0B300040-1-2
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ROHM BD18345EFV-M
BD18345EFV-M
Pin Configuration
FB 1
BASE 2
N.C. 3
OP 4
SCP 5
GND 6
PBUS 7
N.C. 8
THD 9
PWMOUT 10
(TOP VIEW)
EXP-PAD
20 VIN
19 N.C.
18 EN
17 N.C.
16 DISC
15 CRT
14 D
13 DCDIM
12 VREG
11 OPM
Pin Description
Pin No.
Pin Name
1 FB
2 BASE
3 N.C.
4 OP
5 SCP
6 GND
7 PBUS
8 N.C.
9 THD
10 PWMOUT
11 OPM
12 VREG
13 DCDIM
14 D
15 CRT
16 DISC
17 N.C.
18 EN
19 N.C.
20 VIN
- EXP-PAD
(Note 1) Leave this pin unconnected
Function
Feedback voltage input
Connecting PNP Tr. BASE
No internal connection(Note 1)
LED open detection input
Short circuit protection input
GND
Output for fault flag / Input to disable output current
No internal connection(Note 1)
Connecting resistor for thermal de-rating setting
PWM signal output
Connecting resistor for disable LED open detection voltage setting at reduced voltage
Internal reference voltage output
Connecting resistor for DC dimming setting
Connecting capacitor for disable LED open detection time setting
Connect capacitor and resistor to set output current ON Duty
Connecting resistor to set output current on time
No internal connection(Note 1)
Enable input
No internal connection(Note 1)
Power supply input
The EXP-PAD connect to GND.
www.rohm.com
©2018 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
2/37
TSZ02201-0T3T0B300040-1-2
21.Sep.2018 Rev.001



ROHM BD18345EFV-M
BD18345EFV-M
Block Diagram
VREG
VIN
EN
VREG
PBUS
VREG
PBUS
OPM
VREG
OPEN
MASK
Over
Voltage
Mute
Control
Logic
D D COMP
VREG
0.9 V 1.0 V
DELAY
Rise 1 µs
CRT
DISC
CR
TIMER
FB
VREF
BASE
OPENLOAD
OP
1.2 V
V IN
SCP
1.20 V 1.25 V
SCP
DC
Dimming
DCDIM
THD
Dimming
THD
PWMOUT
GND
www.rohm.com
©2018 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
3/37
TSZ02201-0T3T0B300040-1-2
21.Sep.2018 Rev.001







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