BCR601 [INFINEON]

BCR601 is a linear LED controller IC regulating the LED current with an external driver transistor. It supports either NPN bipolar transistors or N-channel MOSFETs to cover a wide LED current and power range up to several amperes. The LED current is fully scalable by dimensioning an external resistor at MFIO pin.;
BCR601
型号: BCR601
厂家: Infineon    Infineon
描述:

BCR601 is a linear LED controller IC regulating the LED current with an external driver transistor. It supports either NPN bipolar transistors or N-channel MOSFETs to cover a wide LED current and power range up to several amperes. The LED current is fully scalable by dimensioning an external resistor at MFIO pin.

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BCR601 hot plug IC with voltage feedback to primary  
side  
60V linear LED controller IC for dimmable LED driver with ripple suppression, overvoltage,  
overtemperature and hot plug protection  
Features  
Supply voltage 8 V to 60 V,  
Supports use of NPN bipolar transistors and NMOSFETs,  
100 Hz/120 Hz supply voltage ripple suppression,  
Supports an optocoupler voltage feedback loop to primary side minimizing power  
losses,  
3% analog dimming of LED current by a resistor or DC voltage at the MFIO pin,  
Rset functionality at MFIO pin,  
LED current precision ±3%.  
Protection features  
Hot plug protection to minimize LED inrush current,  
Overvoltage protection,  
Overtemperature protection.  
Target applications  
LED driver.  
Advantages with respect to discrete solutions  
Low BOM count,  
Lower assembly cost,  
Smaller form factor,  
Higher reliability due to less parts and soldering joints.  
Product validation  
Qualified for industrial applications according to the relevant tests of JEDEC47/20/22.  
Datasheet  
www.infineon.com  
Please read the Important Notice and Warnings at the end of this document  
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Device information  
Device information  
8
7
6
5
1
2
3
4
VDROP  
DRV  
OVP  
VS  
GND  
OPTO  
MFIO  
VSENSE  
Figure 1  
Pin definition PG-DSO-8 pin out  
Table 1  
Type  
Part information  
Package  
Configuration  
Marking code  
60V Linear Voltage and  
Current Control Chip  
BCR601  
PG-DSO-8  
n.a.  
BCR601  
Description  
BCR601 is a linear LED controller IC regulating the LED current by means of an external driver transistor. BCR601  
supports use of NPN bipolar transistors and NMOS MOSFETs to cover a wide LED current and power range.  
BCR601 provides feedback to the primary side via an optocoupler to control the output voltage of the primary  
side converter, e.g. a flyback. The control loop minimizes the voltage overhead and power dissipation of the  
external driver transistor. The voltage overhead can be adjusted by external configuration according to  
application needs.  
BCR601 suppresses the voltage ripple of the power supply driving a constant LED current for better light quality.  
The LED current is fully scalable by dimensioning an external current sense resistor.  
The embedded hot plug protection allows plug in and plug out of the LED load during operation reducing LED  
current overshoots and related LED life time degradations.  
The adjustable overvoltage protection will provide feedback to the primary side by the optocoupler in case the  
supply voltage exceeds the threshold.  
The overtemperature protection will dim the LED current if the BCR601 junction temperature threshold is  
exceeded. In this case the LED current will be reduced to 30% of the nominal current. Once the junction  
temperature drops below the temperature hysteresis nominal LED current is resumed.  
The BCR601 is a perfect fit for LED applications by combining small form factor with low cost. Through its higher  
integration, BOM savings and ensuring long lifetime of LEDs, this controller has many advantages compared to  
discrete solutions.  
Datasheet  
2
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Table of contents  
Table of contents  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Protection features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Target applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Advantages with respect to discrete solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
Product validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
Device information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2  
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
1
2
3
4
5
6
7
8
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9  
Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Datasheet  
3
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Pin configuration  
1
Pin configuration  
8
7
6
5
1
VDROP  
DRV  
OVP  
2
VS  
3
GND  
OPTO  
4
VSENSE  
MFIO  
Figure 2  
Table 2  
Pin definition PG-DSO-8 pin out  
Pin configuration  
Pin no.  
Pin name  
OVP  
Pin type  
Input  
Function  
1
2
3
4
5
6
7
8
Supply voltage measurement for overvoltage protection  
Supply voltage  
VS  
Input  
OPTO  
MFIO  
Output  
Input  
Output to control the optocoupler current  
Multifunctional IO for resistive and DC voltage dimming  
Measurement of Vsense voltage  
VSENSE  
GND  
Input  
GND  
IC ground  
DRV  
Output  
Input  
Driver output to control base or gate of the external transistor  
Measurement of Vdrop voltage  
VDROP  
Datasheet  
4
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2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Functional description  
2
Functional description  
Cin1  
Rpred  
ROVP1  
ROVP2  
COVP  
Controller  
IC  
RZener  
RDROP  
ROPTO  
VDROP  
DRV  
OVP  
VS  
ZD1  
COPTO  
OR  
BCR601  
GND  
OPTO  
VSENSE  
DAC  
MFIO  
Rset  
Rsense  
RPI  
CPI  
Figure 3  
Typical application circuit  
Application hints  
1.  
External driver transistors  
BCR601 is able to drive NPN transistors as well as NMOSFETs. NPN transistors can be used for LED  
currents up to several hundred of mA while NMOSFETs are preferable for high LED currents. The smaller  
current using BJTs is caused by the DC current gain value hFE value of the used BJT. E.g. a typical hFE of 75  
limits the application to a maximum below 750 mA.  
2.  
Supply voltage of BCR601  
To drive higher output currents into an external NPN driver transistor it might be necessary to limit the  
supply voltage of BCR601 significantly below 60 V to reduce power dissipation inside the IC. This can be  
achieved either by adding a series resistor Rpred between supply voltage and VS pin of BCR601 or by  
operating BCR601 by an auxiliary winding of the power supply providing a lower IC supply voltage as e.g.  
8 V.  
Dimming mechanism  
For dimming of the LED current a DC voltage is applied to the MFIO input signal.  
1.  
Analog dimming: input voltage VMFIO at pin MFIO. Continuous dimming from 3% dimming level up to  
100% is embedded into a 100% ceiling plateau and an hysteresis range to off. Static dimming to a fixed  
value can be done via the resistor Rset  
.
Datasheet  
5
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Functional description  
ILED  
100%  
Analog dimming range  
3%  
0%  
VMFIO  
3%  
dim  
100%  
off  
0.1V 0.2V  
3.3 V  
5 V  
Figure 4  
Analog dimming  
2.  
For analog dimming using Rset and internal MFIO current, the internal pull-down has to be taken into  
account. For proper dimensioning refer to Figure 5.  
5 V  
BCR601  
IMFIO,setcs  
MFIO  
R
MFIO/2  
Rset  
Limiter,  
Buffer  
R
MFIO/2  
Rset * RMFIO  
Rset + RMFIO  
VMFIO = IMFIO, setcs  
VMFIO * RMFIO  
IMFIO, setcs * Rset VMFIO  
Rset  
=
Figure 5  
Rset dimensioning for resistor dimming  
RMFIO.typical = 285 kΩ,  
IMFIO,setcs,typical = 20 µA.  
Datasheet  
6
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Functional description  
V
drop / Vsense measurement  
ILED  
RDROP  
Vdrop  
VC/D  
VDROP  
VSENSE  
Vsense  
Rsense  
Idrop  
Figure 6  
BCR601 incorporates two control loops:  
1. Fast LED current control loop  
VDROP versus VSENSE measurement  
In a proper design, the converter output voltage ripple will drop across the external power transistor  
(drain voltage VC/D) and “consumed” by the power transistor, so that the voltage across the LED string is  
constant. The LED current is sensed by the current sense resistor Rsense. The fast LED current control loop  
regulates the power transistor to keep the LED current constant. LED current is defined by the equation.  
ILED = Vsense/Rsense  
VC/D needs to be set high enough to make sure that BCR601 can regulate the power transistor to conduct  
a constant LED current. To enable adjustment of VC/D BCR601 has an integrated constant current sink  
Idrop at pin VDROP. By the external resistor RDROP the collector/drain voltage VC/D with respect to Vdrop is  
defined by the following equation.  
VC/D = Vdrop + Idrop RDROP  
If VC/D is chosen too low, LED current will drop because either NPN hFE will drop too low and BCR601 IDRV  
reaches its maximum sourcing current, or NMOSFET drain to source resistance RDSon cannot be reduced  
further more as VDRV of BCR601 reaches its upper limit . As a result the output voltage ripple will  
modulate the LED current and flicker might become visible. If VC/D is chosen too high, power loss in the  
external power transistor will be high, resulting in low power efficiency and increased effort in heat  
dissipation of the power transistor.  
2.  
Slow control loop for the primary side output voltage  
In typical application, the primary side controller is integrated with active PFC function. The output  
voltage contains an unavoidable ripple of 100 Hz (at 50 Hz grid) or 120 Hz (at 60 Hz grid). The crossover  
frequency of the control loop must be much smaller than the ripple frequency, so that the ripple voltage  
is not regulated and the power factor is not deteriorated. This is realized by the RC compensation  
network (RPI, RDROP, CPI and CDROP) connected between OPTO pin and VDROP pin.  
Datasheet  
7
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Thermal characteristics  
3
Thermal characteristics  
Figure 7  
Maximum permitted effective output source current out of pin DRV into external driver  
transistor for a design example of 4 mA DC driver  
The maximum permitted effective driver source current shown in Figure 7 can be calculated by following  
equation:  
T
T  
V
I
OTP, min  
A
S
OPTO  
2
VS IS −  
R
2
TOTP, min TA  
VS RthJA  
IOPTO  
4
thJA  
IDRV  
=
=
IS −  
VS  
The equation considers the power dissipation caused by current consumption of the IC itself and the  
optocoupler current. If driver current exceeds the calculated threshold the lower specified limit of the  
overtemperature protection will be exceeded and OTP might be triggered.  
TOTP,on, min  
The lower spec limit of the overtemperature protection threshold should not be exceeded to  
avoid triggering the OTP.  
IOPTO  
The maximum optocoupler sink current into pin OPTO when IC fully turns on the current sink.  
Besides the spec limits of BCR601 the maximum current is also limited by the optocoupler  
supply voltage and external pull-up resistor.  
Datasheet  
8
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Absolute maximum ratings  
4
Absolute maximum ratings  
Table 3  
Maximum ratings  
Parameter  
Symbol  
Values  
Typ.  
Unit  
Note or test condition  
Min.  
–40  
Max.  
160  
Junction temperature  
Supply voltage  
TJ  
-
°C  
V
-
VS  
0
0
0
0
0
0
65  
Input voltage at pin VDROP  
VDROP  
65  
V
Input voltage at pin VSENSE Vsense  
3.6  
65  
V
Input voltage at pin OPTO  
Input voltage at pin OVP  
Input voltage at MFIO  
Power dissipation  
VOPTO  
VOVP  
VMFIO  
Ptot  
V
3.6  
5.0  
360  
V
V
mW  
VS = 60 V, IS = 2 mA, IDRV =  
- 4 mA  
ESD robustness  
VESD,HBM  
VESD,CDM  
-
-
1.5  
kV  
V
HBM acc. to JEDEC  
JS-001  
500  
CDM acc. to JEDEC  
JS-002  
Attention: Stresses above the maximum values listed here may cause permanent damage to the device.  
Exposure to absolute maximum rating conditions for extended periods may affect device  
reliability. Maximum ratings are absolute ratings. Exceeding only one of these values may cause  
irreversible damage to the component.  
Table 4  
Maximum thermal resistance  
Parameter  
Symbol  
Values  
Typ.  
Unit  
Note or test condition  
Min.  
Max.  
180  
Thermal resistance junction RthJA,0  
to ambient  
K/W  
JEDEC 1s0p (JESD 51-3)  
footprint without extra  
cooling area  
RthJA,300  
135  
125  
JEDEC 1s0p (JESD 51-3)  
with 300 mm² cooling  
area  
RthJA,600  
JEDEC 1s0p (JESD 51-3)  
with 600 mm² cooling  
area  
Datasheet  
9
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Operating conditions  
5
Operating conditions  
Table 5  
Operating conditions  
Parameter  
Symbol  
Min.  
Values  
Typ.  
Unit Note or test condition  
Max.  
Junction temperature  
Supply voltage  
TJ  
–40  
0
160  
60  
°C  
V
VS  
Input voltage at pin  
VDROP  
0
60  
V
VDROP  
Input voltage at pin OPTO VOPTO  
0
60  
V
Datasheet  
10  
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Electrical characteristics  
6
Electrical characteristics  
Note:  
All parameters are measured atTA = 25 °C, VS = 45 V, unless otherwise specified.  
Note:  
ILED,target current is the undimmed current at a VSENSE voltage drop of 400 mV typical.  
Table 6  
DC characteristics  
Parameter  
Symbol  
Values  
Typ.  
Unit Note or test condition  
Min.  
Max.  
IC system  
Supply voltage  
VS  
8
60  
8
V
V
V
Operational supply  
voltage range  
Supply undervoltage  
lock-in  
VS,uvli  
VS,uvlo  
Supply undervoltage  
lock-out  
6.7  
Supply current  
IS  
-2.2  
3
-
mA  
V
IDRV, source = 0 mA  
Voltage at pin OPTO  
VOPTO  
To achieve IOPTO = 2 mA  
Optocoupler sink current IOPTO  
-3.6  
-2  
mA  
Sink current range of  
pin OPTO if VOPTO,min  
with VOVP = 0.2 V  
Optocoupler leakage  
current  
IOPTO,leak -80  
age  
-
µA  
VOVP = 0.8 V, VOPTO = 3 V,  
VDROP = 0.2 V  
Sense voltage  
VSENSE  
388  
400  
412  
mV  
Closed loop reference  
voltage of pin VSENSE,  
ILED = Vsense / Rsense at  
VMFIO = 3.3 V  
Voltage at pin VDROP  
Voltage at pin VDROP  
Voltage at pin VDROP  
VDROP,5 0.275  
V
V
V
At IOPTO= 100 µA (5 % of  
full range), VOVP < 1.1 V  
VDROP  
0.295  
0.31  
0.325  
0.345  
At IOPTO= 1mA (50 % of  
full range), VOVP < 1.1 V  
VDROP,95  
At IOPTO = 1.95 mA  
(95 % of full range),  
VOVP < 1.1 V  
Sink current at pin  
VDROP  
IDROP  
-6.9  
-5.5  
8
-4.1  
µA  
Constant current sink  
at pin VDROP  
Hot plug  
Hot plug VSENSE  
threshold  
Vsense, HP  
mV  
VSENSE level at which  
hot plug event is  
detected  
Driver  
Driver source current  
capability  
IDRV,  
source  
10  
-
-
mA  
Source current range of  
pin DRV to drive NPN  
base/NMOS gate  
Datasheet  
11  
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Electrical characteristics  
Table 6  
DC characteristics (continued)  
Parameter  
Symbol  
Min.  
Values  
Typ.  
Unit Note or test condition  
Max.  
Driver sink current  
capability  
IDRV, sink  
-
-
-10  
5.5  
mA  
V
Sink current range of  
pin DRV to discharge  
NPN base/NMOS gate  
Driver source voltage  
VDRV  
4.5  
5
Max. output voltage of  
pin DRV  
Analog dimming  
MFIO output source  
current  
IMFIO,  
setcs  
18  
20  
22  
µA  
For RSET < 10 kΩ, in  
parallel internal pull-  
down RMFIO connected,  
refer to Figure 3  
MFIO output voltage  
VMFIO,  
setcs  
4.2  
V
MFIO output voltage at  
MFIO open  
MFIO pull-down resistor RMFIO  
228  
0
285  
342  
0.1  
kΩ  
V
Internal pull down  
resistor at pin MFIO  
MFIO turn-off range  
MFIO turn-on range  
MFIO dimming range  
MFIO full current range  
DC LED dimming  
VMFIO, off  
Threshold for analog  
dimming to off  
VMFIO,on 0.17  
0.195  
3.3  
5
V
Threshold for analog  
dimming to on  
VMFIO,  
dim  
0.2  
3.3  
V
Minimum to maximum  
LED current  
VMFIO,  
100%  
V
MFIO range always at  
100% ILED  
ILEDmin,  
3
%
Minimum dimming LED  
current level at MFIOdim  
= 0.15 V  
/
ana  
ILEDmin,  
target  
LED current chip to chip  
variation at selected  
dimming level  
Δ
-20  
-10  
20  
10  
%
%
Max variation at  
minimum MFIO  
dimming level  
ILED,dim  
/
ILED,dim  
Max variation for  
dimming level higher  
than minimum  
LED current accuracy  
LED current accuracy  
ILED, acc -3  
3
Closed loop LED  
current accuracy  
without dimming  
atVMFIO = 3.3 V  
Overvoltage protection OVP  
Overvoltage protection  
minimum voltage  
VOVP,min 0.1  
V
V
Minimum voltage  
required at pin OVP  
Overvoltage protection  
threshold, OVP on  
VOVP,on, 1.11  
10  
1.15  
1.19  
At 10% IOPTO-OVP range  
~0.2 mA, VDROP = 0.2 V  
Datasheet  
12  
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Electrical characteristics  
Table 6  
DC characteristics (continued)  
Parameter  
Symbol  
Min.  
Values  
Typ.  
Unit Note or test condition  
Max.  
1.24  
Overvoltage protection  
threshold, OVP on  
VOVP,on 1.15  
1.20  
V
At IOPTO-OVP = 2 mA,  
VDROP = 0.2 V  
Optocoupler sink current IOPTO,OVP -3.2  
at OVP active  
-2.1  
mA  
Sink current range of  
pin OPTO at VOPTO,min  
3 V with VOVP = 1.3 V  
and VDROP = 0.2 V  
=
OVP pull down resistor  
ROVP  
100  
120  
140  
155  
kΩ  
°C  
Internal pull-down  
resistor at pin OVP  
Overtemperature protection OTP  
Overtemperature  
protection threshold,  
turn on  
TOTP, on 140  
Junction threshold  
temperature to trigger  
overtemperature  
protection in standby,  
IDRV = 0.1 mA and VS =  
45 V  
Overtemperature  
protection threshold,  
turn off  
TOTP, off 120  
135  
°C  
Junction threshold  
temperature to exit  
overtemperature  
protection in standby,  
IDRV = 0.1 mA and VS =  
45 V  
Sense voltage in OTP  
case  
Vsense,  
OTP  
Vsense,  
target  
30  
20  
%
°C  
Reduction factor at pin  
VSENSE (nominal 400  
mV) if OTP has been  
/
triggered, ILED, OTP  
Vsense,OTP / Rsense  
=
Overtemperature  
protection hysteresis  
TOTP, Hys  
Datasheet  
13  
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
Package information  
7
Package information  
Note:  
Dimension in mm  
Figure 8  
Package outline DSO-8  
Datasheet  
14  
Revision 1.1  
2018-12-3  
BCR601 hot plug IC with voltage feedback to primary side  
References  
8
References  
Revision history  
Document  
version  
Date of  
release  
Description of changes  
1.0  
1.1  
2018-11-23  
2018-12-3  
Public release  
Parameter update  
Datasheet  
15  
Revision 1.1  
2018-12-3  
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Edition 2018-12-3  
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Document reference  
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