INFINEON BCR450

Datasheet, Rev. 3.1, Feb. 2013
LED Driver IC
BCR450
Power Management and
Multimarket
Edition 2013-02-21
Published by Infineon Technologies AG,
81726 München, Germany
© Infineon Technologies AG 2013.
All Rights Reserved.
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circuits, descriptions and charts stated herein.
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BCR450
LED Driver IC
BCR450, LED Driver IC
Revision History: 2013-02-21, Rev. 3.1
Previous Version: 2009-10-15, Rev. 3.0
Page
Subjects (major changes since last revision)
Figure 1
Block diagram: Pin 3 (EN), ESD protection and base resistor added
Table 5
Note 1) added to Enable voltage range
Table 6
Typical input capacitance of pin 3 (EN) added
Figure 5
Units added to figure title
Figure 6
Units added to figure title
Datasheet
3
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
BCR450 Power LED Driver IC
1
BCR450 Power LED Driver IC
Features
• Low voltage drop across sense resistor, 0.15 V typical
• High output current precision
• Operating voltage fro 8 to 27 V
• Over voltage protection
• Overtemperature current foldback and Thermal shut down
function
• Adjustable Constant LED Current up to 85 mA in stand alone
operation
• Precise Internal bandgap enables High output current accuracy
• Up to 2.5 A LED current possible by using external transistor
• EN Input for PWM LED brightness control and On/Off control
• Very Low Standby Current
• Minimum number of external components required, no inductors
• Very small SC-74 package: 2.9 mm x 2.5 mm x 1.1 mm
4
3
5
2
6
1
Typical 12V High Power LED Application
Vs
Benefits
• High level of colour control due to high output current precision
• Small space requirement
• No electro- magnetic interference
• Active thermal monitoring of chip and LED temperature with
current fold- back to avoid thermal overstress
• Low cost device
• Scalable output stage optimizing cost and space
350mA
6
3
BCR450
4
1
2,5
BCX68-25
Typical Applications
• General lighting e.g. retrofits
• Architectural lighting, Medical and Dental lighting
• Transportation like train and aircraft lighting
• Strobe lighting
• Universal constant current source
• Signal and marker lights for orientation or navigation
• LED controller for industrial applications, not qualified to AECQ100
2
Description
The BCR450 is a LED driver IC optimized for usage with an external power transistor for driving LEDs above
100 mA. For currents up to 85 mA the BCR450 can be used in stand alone operation. The output current level can
be adjusted with an external sense resistor.
The IC can be switched on and off by an external signal, which is also suitable to regulate brightness of the LEDs
by PWM dimming.
The precise internal bandgap stabilizes the circuit and provides stable current conditions over temperature range.
Additional features are included to protect the LEDs from overload, short circuit events as well as from over
voltage. The LEDs can be also protected against thermal overload by thermally coupling the LEDs to the BCR450.
Datasheet
4
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Description
LED Controller
BCR450
Iout
1
GND
2
Output
stage
EN
Vref
OP
6
Vs
5
GND
Bandgap
4 Vsense
3
BCR450_ Block diagram.vsd
Figure 1
Block diagram
Pin Definition
Table 1
Pin definition and function
Pin number
Pin Symbol
Function
1
Iout
Controlled output current to drive LEDs
2
GND
IC ground
3
EN
Power On control voltage pin (PWM input)
4
Vsense
Sense control voltage pin for internal feedback mechanism
5
GND
IC ground
6
Vs
Supply voltage
Table 2
Marking
Type
Marking
Package
BCR450
50s
SC74
Datasheet
5
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Description
AC Measurement
S1
=
S2
~ 150 mV
S3
Source 4
Vs
Vsense
-
S4
S5
=
=
S6
5V=
Source 2
S9
Vref
R1
EN
=
Source 1
IOut
+
Source 5
PWM
S8
S7
Source 3
=
GND
R2
Vout
BCR450_Test circuit.vsd
Figure 2
Electrical test circuit
Thermal resistance
Table 3
Thermal resistance
Parameter
Symbol
Value
Unit
Junction - solder point
RthJS
75
K/W
Absolute Maximum Ratings
Table 4
Absolute Maximum ratings
Parameter
Symbol
Limit Value
Unit
Supply voltage
40
V
Sense Voltage
Vs
Vsense
200
mV
Output current
Iout
100
mA
Total Power Dissipation; Ts= 112.5°C
Ptot
TJ
TSTG
VESD_HBM
500
mW
150
°C
-65... 150
°C
2000
V
Junction temperature
Storage temperature range
ESD capability Human Body Model
1)
1) For ESD testing, the chip was mounted in a SC74 package on an application board, where GND is electrically connected
to the chip GND
Datasheet
6
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Electrical Characteristics
3
Electrical Characteristics
3.1
DC Characteristics
8 V < VS < 27 V; - 40 °C < TJ < 150 °C, all voltages with respect to ground; current directions as given in Figure 2;
unless otherwise specified
All parameters are tested at 25 °C, unless otherwise specified
Table 5
DC Characteristics
Parameter
Symbol
Values
Min.
Typ.
70
90
Unit
Note / Test Condition
mA
Is short; Vs = 8..27 V
Vsense = 20 mV
Is short; Vs = 42 V
Vsense = 20 mV
Max.
Overall current consumption
Isshort
Overall current consumption
Isshort
600
μA
Overall standby current consumption
Isstandby
200
nA
EN = 0 V; Vs= 8..27 V
Vsense = 20 mV
Current of enable input
IEN
Iouthigh
μA
Current of driver output
Current of driver output
Ioutlow
100
nA
Current of Sense input
Isense
Vout
200
nA
Vsense = 0..200 mV
Vsense = 20 mV;
Vs = 8 V
Vsense = 200 mV;
Vs = 8V
Vsense = 20..200 mV
Iout = 15 mA;
Voltage of Driver output
20
40
70
90
70
mA
6
V
S1, S6, S8, S9 = on;
R1 = 390 Ω;
R2 = 10 Ω;
see Figure 2
Voltage of Sense input
Vsense
135
150
165
mV
Iout = 15 mA;
Vs = 8..27 V
S3, S6, S8 = on;
R1 = 390 Ω;R2 = 10 Ω
TJ = 115 °C
see Figure 2
Enable voltage range
Control voltage for power on
Control voltage for power off
Over voltage Protection
Delta sense voltage
Drop Voltage
Temperature shut down
UPon
UOn
UOff
Vs, OV
ΔVsense
Vs - Vout
TSD
-0.3
0.6
0.85
-0.3
51)
V
5
V
0.35
V
27
V
2
10
50
1.2
130
150
mV
V
170
°C
Iout -> 0 A
Iout: 0 -> 50 mA
Iout < 40 mA
Iout -> 0 A; refer to TJ
1) ESD protection diode of pin 3 (EN) will breakdown above 5 V input voltage to GND
Datasheet
7
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Electrical Characteristics
3.2
Digital Signals
All parameters are tested at 25 °C, unless otherwise specified
Table 6
Digital Control Parameter (EN)
Parameter
Symbol
PWM signal frequency
fPWM
Values
Min.
Typ.
Unit
Note /
Test Condition
Hz
tdutycycle = 1%;
Max.
1000
signal level
reaches 100% in
on and off mode
PWM Duty cycle
tdutyPWM
PWM voltage
UPWM
EN input capacitance to GND
CEN
3.3
5
%
5
130
F = 5 kHz; signal
level reaches
100% in on and off
mode
V
pF
EN = 0 V
Transient Parameters
8 V < VS < 27 V; - 40 °C < TJ < 150 °C, all voltages with respect to ground; current directions as given in Figure 2;
unless otherwise specified
All parameters are tested at 25 °C, unless otherwise specified
Table 7
Digital Control Parameter (EN)
Parameter
Symbol
Values
Min.
Response Time
Datasheet
Typ.
Unit
Note / Test Condition
Max.
TON
10
μs
EN: 0 -> 5 V @ trise < 20 ns
trisetime @(10...90%) * Vsense
(Iout ~ 15 mA);Rsense = 10 Ω
TOFF
70
μs
EN: 5 V -> 0 @ tfall < 20 ns
tfalltime @(90...10%) * Vsense
(Iout ~ 15 mA); Rsense = 10 Ω
8
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Measured Parameters
4
Measured Parameters
BCR450 IC has been measured in test bench with undefined high thermal resistance
This is valid for all diagramed DC- and AC- Parameters
4.1
DC- Parameter
Vout = 1.0 V, EN = 2.4 V
IS vers Temperature (VS); Vsense = 20 mV
IS vers Vs (Temperature); Vsense = 20 mV
I_s_vers Temp; Vs
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
I_s_vers Vs; Temp
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
120.00
105.00
-40°C
100.00
95.00
0°C
Vs_8V
90.00
Vs_14V
85.00
Vs_27V
80.00
Vs_40V
75.00
25°C
80.00
Is (mA)
Is (mA)
-25°C
100.00
45°C
65°C
60.00
85°C
105°C
40.00
Vs_42V
125°C
70.00
150°C
20.00
65.00
0.00
60.00
-40
-25
0
25
45
65
85
105
125
8
150
14
Is vers Temp_Vs_20mV_Vout1V.vsd
I_en_vers Vs; Temp
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
48.00
48.00
46.00
46.00
44.00
44.00
Vs_8V
Vs_14V
40.00
Ien (uA)
Ien (uA)
42.00
Vs_27V
38.00
Vs_40V
36.00
Vs_42V
45°C
38.00
65°C
36.00
85°C
32.00
30.00
30.00
Datasheet
65
85
105
125
0°C
25°C
32.00
45
-25°C
40.00
34.00
25
-40°C
42.00
34.00
0
42
Ien vers Vs (Temperature); Vsense = 20 mV
I_en_vers Temp; Vs
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
-25
40
Is vers Vs_Temp_20mV_Vout1V.vsd
Ien vers Temperature (VS); Vsense = 20 mV
-40
27
Vs (V)
°C
105°C
125°C
150°C
8
150
14
27
40
42
°C
Vs (V)
Ien vers Temp_Vs_20mV_Vout1V.vsd
Ien vers Vs_Temp_20mV_Vout1V.vsd
9
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Measured Parameters
Isense vers Temperature (VS); Vsense = 20 mV
Isense vers Vs (Temperature); Vsense = 20 mV
I_sense_vers Vs; Temp
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
145.00
145.00
140.00
140.00
135.00
135.00
Vs_8V
130.00
Isense (nA)
Isense (nA)
I_sense_vers Temp; Vs
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
Vs_14V
125.00
Vs_27V
120.00
Vs_40V
115.00
Vs_42V
25°C
45°C
120.00
65°C
115.00
85°C
105.00
105.00
100.00
100.00
0
25
45
65
85
105
125
0°C
125.00
110.00
-25
-25°C
130.00
110.00
-40
-40°C
105°C
125°C
150°C
150
8
14
27
°C
40
42
Vs (V)
Isense vers Temp_Vs_20mV_Vout1V.vsd
Iout vers Temperature (VS); Vsense = 20 mV
Isense vers Vs_Temp_20mV_Vout1V.vsd
Iout vers Vs (Temperature); Vsense = 20 mV
I_out_vers Vs; Temp
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
I_out_vers Temp; Vs
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
120.00
100.00
95.00
-40°C
100.00
-25°C
85.00
Vs_14V
80.00
Vs_27V
Vs_40V
75.00
0°C
80.00
Vs_8V
Iout (mA)
Iout (mA)
90.00
25°C
45°C
60.00
65°C
85°C
40.00
Vs_42V
105°C
70.00
125°C
20.00
65.00
150°C
0.00
60.00
-40
-25
0
25
45
65
85
105
125
8
150
14
27
40
42
Vs (V)
°C
Iout vers Temp_Vs_20mV_Vout1V.vsd
Vs = 14 V, Vout = 1 V; EN = 2.4 V
Iout vers Temperature (VSense)
Iout vers Vsense (Temperature)
I_out_vers Temp; Vsense
V_s = 14 V; V_out = 1 V; V_en = 2.4 V
I_out_vers V_sense; Temp
V_s = 14 V; V_out = 1 V; V_en = 2.4 V
110mV
114mV
100.00
90.00
-40°C
80.00
126mV
80.00
-25°C
70.00
130mV
70.00
0°C
134mV
60.00
25°C
122mV
60.00
Iout (mA)
138mV
50.00
140mV
45°C
50.00
65°C
40.00
40.00
142mV
30.00
144mV
30.00
105°C
146mV
20.00
125°C
10.00
150°C
148mV
156mV
Vsense (mV)
Iout vers Temp_Vsense_Vs14V_Vout1V.vsd
Datasheet
156
154mV
154
150
152
125
150
105
148
85
146
65
°C
144
45
142
25
140
0
138
-25
134
-40
0.00
130
152mV
126
0.00
122
150mV
118
10.00
114
20.00
85°C
110
Iout (mA)
100.00
118mV
90.00
Iout vers Vsense_Temp_Vs14V_Vout1V.vsd
10
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Measured Parameters
Vs = 14 V, Vout = 6 V; EN = 20 mV
Iout vers EN (Temperature)
I_out_vers V_en; Temp
V_sense = 20 mV; V_out = 6 V; V_s = 14 V
100.00
-40°C
90.00
-25°C
0°C
Iout (mA)
80.00
25°C
70.00
45°C
65°C
60.00
85°C
50.00
105°C
125°C
40.00
150°C
30.00
0
0.2
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
5
Ven (V)
Iout vers Ven_Vsense20mV_Vs14V_Vout6V.vsd
Vs = 14 V, Vsense = 20 mV; EN = 2.4 V
Iout vers Temperature (Vout)
Iout vers Vout (Temperature)
I_out_vers Temperature; V_out
V_sense = 20 mV; V_en = 2.4 V; V_s = 14 V
I_out_vers V_out; Temp
V_sense = 20 mV; V_en = 2.4 V; V_s = 14 V
Vout=0V
100.00
100.00
Vout=1V
Vout=2V
90.00
Vout=4V
Vout=5V
70.00
Vout=6V
Vout=7V
60.00
Vout=8V
50.00
40.00
-25°C
0°C
80.00
Iout (mA)
Iout (mA)
80.00
-40°C
90.00
Vout=3V
25°C
70.00
45°C
60.00
65°C
85°C
Vout=9V
50.00
Vout=10V
40.00
105°C
125°C
150°C
Vout=11V
30.00
Vout=12V
30.00
-40
-25
0
25
45
65
85
105
125
1
Vout=13V
150
2
3
4
5
6
7
9
10
11
12
13
14
15
Vout (V)
Vout=14V
°C
8
Iout vers Vout_Vsense20mV_Vs14V.vsd
Iout vers Temp_Vout_Vsense20mV_Vs14V.vsd
Vout = 1 V, Vsense = 20 mV; EN = 2.4 V
Is vers VS (Temperature)
I_s_vers Vs; Temp
V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V
100.00
-40°C
90.00
-25°C
0°C
80.00
Is (mA)
25°C
70.00
45°C
60.00
65°C
85°C
50.00
105°C
125°C
40.00
150°C
30.00
6
7
8
9
10
11
12
13
14
15
16
Vs (V)
Is vers Vs_Temp_20mV_Vout1V_entire range.vsd
Datasheet
11
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Measured Parameters
Vout = 6 V, Vsense = 20 mV; EN = 2.4 V
Is vers VS (Temperature)
Is vers VS (Temperature)
I_s_vers Vs; Temp
V_sense = 20 mV; V_out = 6 V; V_en = 2.4 V
I_s_vers Vs; Temp
V_sense = 20 mV; V_out = 6 V; V_en = 2.4 V
100.00
120.00
-40°C
90.00
80.00
-25°C
0°C
70.00
25°C
60.00
45°C
0°C
25°C
45°C
60.00
65°C
85°C
40.00
65°C
50.00
-25°C
80.00
Is (mA)
Is (mA)
100.00
-40°C
105°C
85°C
150°C
125°C
30.00
0.00
150°C
6
6.8
7.6
8.4
9.2
10
11
12
13
14
15
125°C
20.00
105°C
40.00
8
16
10 12 14 16
18 20
22 24 26 28 30 32
34 36 38 40 42
Vs (V)
Vs (V)
Is vers Vs_Temp_20mV_Vout6V.vsd
Is vers Vs_Temp_20mV_Vout6V_entire range.vsd
Is short -> Vout = 0 V, Vsense = 0 mV; EN = 2.4 V
Is vers VS (Temperature)
I_s_vers Vs; Temp
V_sense = 0 mV; V_out = 0 V; V_en = 2.4 V
100.00
-40°C
90.00
-25°C
0°C
80.00
Is (mA)
25°C
70.00
45°C
60.00
65°C
85°C
50.00
105°C
125°C
40.00
150°C
30.00
8
12
16
20
24
27
28.5 29.5 30.5 31.5 32.5 33.5
38
Vs (V)
Is vers Vs_Temp_0mV_Vout0V.vsd
Is standby -> Vout = 0 V, Vsense = 0 mV; EN = 0 V
Is vers VS (Temperature)
I_s_vers Vs; Temp
V_sense = 0 mV; V_out = 0 V; V_en = 0 V
Is (uA)
50.00
45.00
-40°C
40.00
-25°C
35.00
0°C
25°C
30.00
45°C
25.00
65°C
20.00
85°C
15.00
105°C
10.00
125°C
5.00
150°C
0.00
8
12
16
20
24
27
29
31
33
35
37
39
41
Vs (V)
Is vers Vs_Temp_0mV_Vout0V_EN0V.vsd
Datasheet
12
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Measured Parameters
Vout = 6 V, Iout = 15 mA; EN = 2.4 V
Vsense vers VS (Temperature)
Vsense_vers Vs; Temp
Iout = 15 mA; V_out = 6 V; V_en = 2.4 V
155.00
Vsense (mV)
150.00
145.00
Vs=8V
140.00
Vs=14V
Vs=27V
135.00
130.00
125.00
-40
-25
0
25
45
65
85
105
125
150
°C
Vsense vers Vs_Temp_Iout15mA_Vout6V.vsd
Vs = 12 V, Iout = 350 mA , Booster Application , see Figure 3
Iout vers Tsolder
Typical Temperature Shut Down of BCR450
Booster Application
350
300
Iout (mA)
250
200
150
100
50
0
60
70
80
90
100 110
120 130
140
150 160
170
Tsolderpoint (° C)
TSD.vsd
Datasheet
13
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Measured Parameters
EN = 2.4 V
Vdrop vers Iout
Vs
typ. Vdrop
6
Internal Transistor
5
Vdrop
4
Vdrop (V)
BCR450
3
2
Vout
1
0
0
10
20
30
40
50
60
70
80
90
Iout (mA)
BCR450 _Vdrop _Schematic.vsd
4.2
Vdrop .vsd
AC- Parameter
Response Time
Ton & Toff; Vs= 12 V; fPulse= 1 kHz; tduty= 50 %
BCR450_Response-Time.vsd
Datasheet
14
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Evaluation Board
5
Evaluation Board
The evaluation board is designed to test the BCR450 as a stand alone device for lower LED current applications
and also with additional external “booster“ transistors for high current, high brightness LEDs. Up to three external
transistors BCX68 or BC817SU each could be used on the PCB to minimize thermal problems.
3 LEDs in series for high current mode or 3 LEDs for low current applications can be chosen by setting resistors
(for further application hints see AN105). The particular sense voltage can be derived by jumpers which are
provided in the layout for each test case. Additional test circuit is included to measure AC characteristics, and the
ENABLE input is designed to connect a PWM signal. The PCB is manufactured in double sided FR4 with substrate
thickness of 1.0 mm.
Vbat
BCR450 LED Controller
Vs, Pin 6
AC- Measure
Vsense, Pin 4
P1
P2
LEDs
+
Iout, Pin 1
= Vref
EN, Pin 3
GND, Pin 2 & 5
BCX68-25
or
BC817SU
PWM
LEDs
NPN
Power
Transistors
Jumper-H
Jumper-L
Rsensehigh
Rsenselow
BCR450_Application circuit.vsd
Figure 3
Datasheet
Evaluation board schematic
15
Rev. 3.1, 2013-02-21
BCR450
LED Driver IC
Package Information
Via
1.3 mm
0.5 mm Drill
TOP- Layer CU 70 um
FR4 1.0 mm
BOTTOM- Layer CU 70 um
Cross section of application board.vsd
Figure 4
Cross section of evaluation board
6
Package Information
1.1 MAX.
B
4
1
2
3
0.35+0.1
-0.05
0.2M B 6x
0.95
0.15+0.1
-0.06
1.6±0.1
5
2.5±0.1
6
10˚ MAX.
0.1 MAX.
(0.35)
0.25±0.1 10˚ MAX.
2.9±0.2
(2.25)
A
0.2M A
1.9
GPX09300
Figure 5
Package outline; SC74 (dimensions in mm)
0.2
2.7
8
4
Pin 1
marking
3.15
1.15
CPWG5899
Figure 6
Datasheet
Tape loading (dimensions in mm)
16
Rev. 3.1, 2013-02-21