BCR601XUMA1

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 OVP 1 8 VDROP VS 2 7 DRV OPTO 3 6 GND MFIO 4 5 VSENSE Figure 1 Pin definition PG-DSO-8 pin out Table 1 Part information Type 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 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 5 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 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 OVP 1 8 VDROP VS 2 7 DRV OPTO 3 6 GND MFIO 4 5 VSENSE Figure 2 Pin definition PG-DSO-8 pin out Table 2 Pin configuration Pin no. Pin name Pin type Function 1 OVP Input Supply voltage measurement for overvoltage protection 2 VS Input Supply voltage 3 OPTO Output Output to control the optocoupler current 4 MFIO Input Multifunctional IO for resistive and DC voltage dimming 5 VSENSE Input Measurement of Vsense voltage 6 GND GND IC ground 7 DRV Output Driver output to control base or gate of the external transistor 8 VDROP Input Measurement of Vdrop voltage Datasheet 4 Revision 1.1 2018-12-3 BCR601 hot plug IC with voltage feedback to primary side Functional description 2 Functional description Cin1 ROVP1 Rpred ROVP2 Controller IC COVP RZener RDROP ROPTO COPTO VDROP OVP ZD1 DRV VS OR BCR601 DAC OPTO GND MFIO VSENSE Rsense Rset CPI Figure 3 RPI Typical application circuit Application hints 1. 2. 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. 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% 3% off dim 0.1V 0.2V 2. VMFIO 100% 3.3 V 5V Figure 4 Analog dimming 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. 5V BCR601 IMFIO,setcs MFIO RMFIO/2 Rset Limiter, Buffer RMFIO/2 V MFIO = IMFIO, setcs Rset = V MFIO * RMFIO IMFIO, setcs * Rset − V MFIO Figure 5 • • Datasheet Rset * RMFIO Rset + RMFIO Rset dimensioning for resistor dimming RMFIO.typical = 285 kΩ, IMFIO,setcs,typical = 20 µA. 6 Revision 1.1 2018-12-3 BCR601 hot plug IC with voltage feedback to primary side Functional description Vdrop / Vsense measurement ILED RDROP VDROP VC/D Vdrop VSENSE Idrop Vsense Rsense Figure 6 VDROP versus VSENSE measurement BCR601 incorporates two control loops: 1. Fast LED current control loop 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 = V sense /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. V C/D = V drop + Idrop ⋅ RDROP 2. 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. 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 OTP, min − T A IDRV = RthJA − V S ⋅ IS − VS VS 2 ⋅ IOPTO 2 = T OTP, min − T A IOPTO − IS − 4 V S ⋅ RthJA 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 Min. Typ. Unit Note or test condition Max. Junction temperature TJ –40 – 160 °C – Supply voltage VS 0 – 65 V – Input voltage at pin VDROP VDROP 0 – 65 V – Input voltage at pin VSENSE Vsense 0 – 3.6 V – Input voltage at pin OPTO VOPTO 0 – 65 V – Input voltage at pin OVP VOVP 0 – 3.6 V – Input voltage at MFIO VMFIO 0 - 5.0 V - Power dissipation Ptot – – 360 mW VS = 60 V, IS = 2 mA, IDRV = - 4 mA ESD robustness VESD,HBM – – 1.5 kV HBM acc. to JEDEC JS-001 VESD,CDM - - 500 V 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 Min. Thermal resistance junction to ambient Datasheet RthJA,0 Typ. Unit Note or test condition K/W JEDEC 1s0p (JESD 51-3) footprint without extra cooling area Max. – – 180 RthJA,300 – – 135 JEDEC 1s0p (JESD 51-3) with 300 mm² cooling area RthJA,600 – – 125 JEDEC 1s0p (JESD 51-3) with 600 mm² cooling area 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 Values Min. Typ. Unit Note or test condition Max. Junction temperature TJ –40 – 160 °C – Supply voltage VS 0 – 60 V – Input voltage at pin VDROP VDROP 0 – 60 V – 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 Min. Typ. Unit Note or test condition Max. IC system Supply voltage VS 8 – 60 V Operational supply voltage range Supply undervoltage lock-in VS,uvli – – 8 V – Supply undervoltage lock-out VS,uvlo 6.7 – – V – Supply current IS -2.2 – - mA IDRV, source = 0 mA Voltage at pin OPTO VOPTO 3 – – V To achieve IOPTO = 2 mA -3.6 – -2 mA Sink current range of pin OPTO if VOPTO,min with VOVP = 0.2 V Optocoupler leakage current IOPTO,leak -80 – - 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 VDROP,5 0.275 – – V At IOPTO= 100 µA (5 % of full range), VOVP < 1.1 V Voltage at pin VDROP VDROP 0.295 0.31 0.325 V At IOPTO= 1mA (50 % of full range), VOVP < 1.1 V Voltage at pin VDROP VDROP,95 – – 0.345 V At IOPTO = 1.95 mA (95 % of full range), VOVP < 1.1 V Sink current at pin VDROP IDROP -5.5 -4.1 µA Constant current sink at pin VDROP Vsense, HP – 8 – mV VSENSE level at which hot plug event is detected IDRV, - - mA Source current range of pin DRV to drive NPN base/NMOS gate Optocoupler sink current IOPTO age -6.9 Hot plug Hot plug VSENSE threshold Driver Driver source current capability Datasheet 10 source 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 Values Min. Typ. Unit Note or test condition Max. Driver sink current capability IDRV, sink - - -10 mA Sink current range of pin DRV to discharge NPN base/NMOS gate Driver source voltage VDRV 4.5 5 5.5 V Max. output voltage of pin DRV MFIO output source current IMFIO, 18 20 22 µA For RSET < 10 kΩ, in parallel internal pulldown 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 228 285 342 kΩ Internal pull down resistor at pin MFIO MFIO turn-off range VMFIO, off 0 – 0.1 V Threshold for analog dimming to off MFIO turn-on range VMFIO,on 0.17 – 0.195 V Threshold for analog dimming to on MFIO dimming range VMFIO, 0.2 – 3.3 V Minimum to maximum LED current 3.3 – 5 V MFIO range always at 100% ILED – 3 – % Minimum dimming LED current level at MFIOdim = 0.15 V – 20 % Max variation at minimum MFIO dimming level Analog dimming setcs dim MFIO full current range VMFIO, 100% DC LED dimming ILEDmin, ana / ILEDmin, target LED current chip to chip variation at selected dimming level Δ -20 ILED,dim / ILED,dim -10 10 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 Minimum voltage required at pin OVP Overvoltage protection threshold, OVP on VOVP,on, 10 1.11 1.15 1.19 V 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 Values Min. Overvoltage protection threshold, OVP on VOVP,on Note or test condition Max. 1.20 1.24 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 100 120 140 kΩ Internal pull-down resistor at pin OVP ROVP 1.15 Typ. Unit Overtemperature protection OTP Overtemperature protection threshold, turn on TOTP, on 140 – 155 °C 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 – % Reduction factor at pin VSENSE (nominal 400 mV) if OTP has been triggered, ILED, OTP = Vsense,OTP / Rsense Overtemperature protection hysteresis TOTP, Hys – 20 – °C – Datasheet 13 Revision 1.1 2018-12-3 BCR601 hot plug IC with voltage feedback to primary side Package information 7 Note: Figure 8 Datasheet Package information Dimension in mm Package outline DSO-8 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 2018-11-23 • Public release 1.1 2018-12-3 • Parameter update Datasheet 15 Revision 1.1 2018-12-3 Trademarks All referenced product or service names and trademarks are the property of their respective owners. Edition 2018-12-3 Published by Infineon Technologies AG 81726 Munich, Germany © 2018 Infineon Technologies AG All Rights Reserved. Do you have a question about any aspect of this document? Email: erratum@infineon.com Document reference IFX-hcb1522932461817 IMPORTANT NOTICE The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics (“Beschaffenheitsgarantie”) . With respect to any examples, hints or any typical values stated herein and/or any information regarding the application of the product, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. 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