BD7F100EFJ-LBE2

Datasheet Optocoupler-less Isolated Flyback Converter BD7F100HFN-LB BD7F100EFJ-LB Key Specifications General Description Supply Voltage of Operation: 3V to 40V SW Terminal Operating Voltage: 50V (Max) Over Current Limit: 1.25A (Typ) Switching Frequency: 400kHz (Typ) Reference Voltage Accuracy: ±1.5% Quiescent Current: 0µA (Typ) Operating Current: 2mA (Typ) Junction Temperature of Operation: -40°C to +125°C This product guarantees long time supply availability in the industrial instrumentation market. BD7F100 is an optocoupler-less Isolated Flyback Converter. An optocoupler or the tertiary winding feedback circuit which was needed to obtain a stable output voltage isolated by a transformer in the conventional application becomes unnecessary, thus, the number of parts is reduced drastically, producing a small-sized and high-reliability application isolated type power supply. Packages HSON8 HTSOP-J8 Furthermore, a highly by the use of the Original Adapted-Type ON-Time Control Technology, it makes the external phase compensation parts become unnecessary, therefore a highly efficient isolated type power supply application can easily be produced. W(Typ) D(Typ) H(Max) 2.90mm x 3.00mm x 0.60mm 4.90mm x 6.00mm x 1.00mm Features  Guaranteed long time supply availability for Industrial Applications.  No need for an optocoupler or a transformer tertiary winding. The output voltage can be set by two external resistors and the transformer turns ratio.  Uses Original Adapted Type ON-Time Control Technology. High-speed load response is realized and external phase compensation parts are unnecessary.  Fixed switching frequency and low output ripple  Highly efficient light load mode available (PFM operation)  Shutdown / Enable Control  Built-in N-Channel MOSFET  Soft start function  Output load compensation function  Protection functions: VIN Under Voltage Lock-Out (VIN UVLO) Over Current Protection (OCP) Thermal Shutdown Protection (TSD) HTSOP-J8 HSON8 Application  Industrial equipment Isolated Power Supply O Product structure : silicon monolithic integrated circuit www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・14・001 O This product has no designed protection against radioactive rays 1/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Typical Application Circuit VOUT+ VIN VIN SDX/EN VOUT- SW BD7F100HFN-LB FB COMP AGND REF PGND Pin Configuration (TOP VIEW) AGND 1 8 VIN SDX/EN 2 7 SW COMP 3 6 PGND REF 4 5 FB Pin Descriptions Pin No. Pin Name Function 1 AGND 2 SDX/EN 3 COMP 4 REF Output voltage setup 5 FB Output voltage setup 6 PGND Power system GND 7 SW Switching Output 8 VIN Power supply Analog system GND Shutdown/Enable control Load Current Compensation of the output voltage set up www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 2/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Block Diagram VIN FB SW INTERNAL REGULATOR VREF COMPARATOR Shutdown VREF Enable SDX/EN ADAPTIVE ON-TIME CONTROLLER VIN UVLO SOFT START N-Channel MOSFET DRIVER TSD OCP LOAD COMPENSATION AGND REF COMP Current Monitor PGND Description of Blocks 1. INTERNAL REGULATOR This is the regulator block for internal circuits. Also includes a reference voltage generating block (VREF). This block is in the shutdown state when the SDX/EN terminal is below 0.9V (Typ). 2. VIN UVLO This is the input low-voltage-protection block. If the power supply input voltage, VIN, falls to below 2.5V (Typ), it will be detected and this block will be in the protection state and the SW terminal becomes Hi-Z. When the power supply input voltage (VIN) rises to 2.65V (Typ), it automatically recovers thorough the soft start. (Hysteresis voltage: 0.15V (Typ).) 3. SOFT START When the SDX/EN terminal is in the enable state with more than 2.0V (Typ), this block prevents inrush current and overshoot in the rising of the output voltage by making the reference voltage of the COMPARATOR block rise slowly from 0V to VREF voltage. The default soft start time, tSS, is designed to be 6ms (Typ) internally. The min off time is 750ns (Typ) when the output voltage is below 50% of the set voltage. 4. COMPARATOR This is the block which compares the reference voltage VREF with the REF terminal voltage which is the feedback voltage of the SW terminal voltage. Since the feedback loop is structured by a comparator is established, it has excellent response to load fluctuation. 5. ADAPTIVE ON-TIME CONTROLLER This is the block corresponding to the original adapted type ON-Time control technology. Switching frequency is fixed at 400kHz (Typ) under PWM Control when the load is stable. Under On-Time Control, when the load varies, fast load response is enabled by changing the switching frequency. During light load, the highly efficient PFM will operate and the self-power dissipation is suppressed by decreasing the switching frequency. 6. DRIVER This is the block which drives the built-in N-Channel MOSFET. www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 3/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Description of Blocks - continued 7. LOAD COMPENSATION This is the block which compensates the output voltage regulation by VF characteristic fluctuation of the secondary side output diode according to the load current. The current which flows into the built-in N-Channel MOSFET is monitored, and the current according to the compensation quantity and the time constant which are determined by the external resistor and the capacitor of the COMP terminal is drawn from the REF terminal. The output voltage rises and is rectified when feedback current which flows into the external resistor of the REF terminal decreases and the REF terminal voltage falls. 8. TSD This is the temperature protection block. If the chip’s junction temperature, Tj, inside the IC is above 175°C (Typ), it will be detected and this block will be in the protection state and the SW terminal becomes Hi-Z. If Tj falls to below 150°C (Typ), it will return automatically through soft start. 9. OCP This is the over-current protection block. If the peak current during the ON-Time of the built-in N-Channel MOSFET reaches 1.25A (Typ), it will be detected and the N-Channel MOSFET is turned OFF. If output voltage goes to 50% or less of the setting voltage, the peak detection current of OCP will be controlled by 0.625A (Typ).The min off time is 1.5μs (Typ) when the OCP is operated under the condition where the output voltage is 50% of the set voltage. Absolute Maximum Ratings (Ta = 25 °C) Parameter VIN Input Power Voltage Symbol (Note 1) SW Terminal Voltage Rating BD7F100HFN-LB BD7F100EFJ-LB Unit VIN 45 V VSW 60 V VSDX/EN VIN V FB Terminal Voltage VFB VIN-0.3V to lower value of VIN+0.3V or 45V V REF Terminal Voltage VREF 7 V SDX/EN Terminal Voltage COMP Terminal Voltage Power Dissipation VCOMP 7 1.75 Pd Storage Temperature Range Maximum Junction Temperature V (Note 2) 3.75 (Note 3) W Tstg -55 to +150 °C Tjmax 150 °C (Note 1) Not to exceed Power Dissipation (Pd). (Note 2) Reduced by 14.0mW/°C for temperatures above 25°C (when mounted on a one-layer glass-epoxy board with 70mm × 70mm × 1.6mm dimension, 65% copper foil density) (Note 3) Reduced by 30.0mW/°C for temperatures above 25°C (when mounted on four-layer glass-epoxy board with 70mm × 70mm × 1.6mm dimension.) Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum ratings. Recommended Operating Conditions Parameter Symbol Limit Min Typ Max 3 24 40 Unit VIN Input Power Voltage VIN SW Terminal Voltage VSW - - 50 V Tj -40 - +125 °C Junction Temperature (Note4) V (Note 4) Life time is derated at junction temperature greater than 125°C. www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 4/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Electrical Characteristics (Unless otherwise specified Ta = 25°C, VIN = 24V, and VSDX/EN = 2.5V.) Parameter Symbol Limit Min Typ Max Unit Conditions Power Supply Quiescent Current IST - 0 10 µA Operating Current ICC - 2 4 mA UVLO Detection Voltage VUVLO 2.3 2.5 2.7 V UVLO Hysteresis Voltage VUVLO_HYS 0.1 0.15 0.2 V VSDX 0.3 0.9 1.5 V VSDX/EN = 0V VSDX/EN = 2.5V VREF = 2V (at PFM operation) VIN falling SDX/EN Control Shutdown Voltage Enable Voltage VEN 1.9 2.0 2.1 V Enable Hysteresis Voltage VEN_HYS 0.15 0.2 0.25 V SDX/EN Input Current ISDX/EN - 0 1 µA VREF 0.768 0.78 0.792 V ON-Resistance RON - 0.5 - Ω Over Current Limit ILIMIT 1 1.25 1.5 A fSW - 400 - kHz tON_MIN - 350 - ns Minimum OFF Time tOFF_MIN - 300 - ns Maximum OFF Time tOFF_MAX - 20 - µs tSS - 6 - ms VSDX/EN rising VSDX/EN=2V Reference Voltage Reference Voltage Switch Characteristics Switching Frequency Minimum ON Time Soft Start Time www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 5/28 Between SW - PGND terminals At PWM operation (Duty=40%) 0V to (VREF×90%) TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Typical Performance Curves 8 Restriction by the current limit 1A (Min) (W) POWER OUTPUT MAXIMUM Maximum [W] Output Power 7 Restriction by the SW terminal voltage 50V (Max) 6 5 4 Maximum output power is restricted in general by a current limit and the maximum operating voltage of SW terminal. Furthermore, it also changes with the characteristics of external parts (Transformer, Schottky barrier diode, Snubber circuit, etc.). 3 2 1 0 0 5 10 15 20 25 30 35 40 45 50 VIN VOLTAGE Voltage [V](V) VIN Figure 1. Maximum Output Power vs VIN Voltage www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 6/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Typical Performance Curves 1 2.5 0.9 2 0.7 Operating Current [mA] Quiescent Current [μA] 0.8 0.6 0.5 0.4 SDX/EN=0V 0.3 0.2 1.5 1 REF=2V COMP=0V 0.5 0.1 0 0 0 10 20 30 40 0 10 VIN Voltage [V] 30 40 VIN Voltage [V] Figure 2. Quiescent Current vs VIN Voltage Figure 3. Operating Current vs VIN Voltage 40 500 450 35 400 30 Switching Frequency [KHz] SDX/EN Input Current [μA] 20 25 20 15 10 5 350 300 250 200 150 100 50 0 0 0 5 10 15 20 25 30 35 40 SDX/EN Voltage [V] 25 30 35 40 45 50 Duty [%] Figure 4. SDX/EN Input Current vs SDX/EN Voltage www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 20 Figure 5. Switching Frequency vs Duty 7/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB 100 5.25 90 5.2 80 5.15 70 5.1 Output Voltage [V] Efficiency [%] Typical Performance Curves 60 50 40 30 5.05 5 4.95 4.85 10 4.8 0 200 400 600 800 1000 Load Current [mA] No load compensation 4.9 20 0 With load compensation RCOMP=43kΩ 4.75 0 200 400 600 800 1000 Load Current [mA] Figure 7. Output Voltage vs Load Current (24V Input, 5V Output) Figure 6. Efficiency vs Load Current (24V Input, 5V Output) 5 4.95 Output Voltage [V] 4.9 4.85 IOUT: 500mA/Div 4.8 4.75 4.7 VOUT: 500mV/Div IOUT=1A No load compensation 4.65 4.6 4.55 4.5 -50 0 50 100 150 Time: 1ms/Div Ambient Temperature [°C] Figure 8. Output Voltage vs Ambient Temperature (24V Input, 5V Output) www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Figure 9. Load Transient Response (24V Input, 5V Output, with Load Compensation, and IOUT = 300mA 1A) 8/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Typical Performance Curves VIN: 20V/Div VIN: 20V/Div SDX/EN: 2V/Div SDX/EN: 2V/Div VOUT: 2V/Div VOUT: 2V/Div SW: 20V/Div SW: 20V/Div Time: 4ms/Div Time: 4ms/Div Figure 11. Shutdown Waveforms (SDX/EN control) (24V Input, 5V Output, SDX/EN=2.5V->0V) Figure 10. Start Up Waveforms (SDX/EN control) (24V Input, 5V Output, SDX/EN=0V->2.5V) VIN: 20V/Div VIN: 20V/Div SDX/EN: 2V/Div VOUT: 2V/Div SDX/EN: 2V/Div VOUT: 2V/Div SW: 20V/Div SW: 20V/Div Time: 4ms/Div Time: 4ms/Div Figure 13. Shutdown Waveforms (VIN control) (24V Input, 5V Output, VIN=24V->0V, R1=1MΩ, R2=120kΩ) Figure 12. Start Up Waveforms (VIN control) (24V Input, 0V Output, VIN=0V->24V, R1=1MΩ, R2=120kΩ) www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 9/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB 100 15.5 90 15.4 80 15.3 70 15.2 Output Voltage [V] Efficiency [%] Typical Performance Curves 60 50 40 30 15.1 No load compensation 15 14.9 14.8 20 14.7 10 14.6 0 With load compensation RCOMP=9.1kΩ 14.5 0 100 200 300 400 Load Current [mA] 0 100 200 300 400 Load Current [mA] Figure 14. Efficiency vs Load Current (24V Input, ±15V Output) Figure 15. Output Voltage vs Load Current (24V Input, ±15V Output) 15.5 15.4 Output Voltage [V] 15.3 15.2 15.1 15 14.9 14.8 IOUT=330mA (±total) No load compensation 14.7 14.6 14.5 -50 0 50 100 150 Ambient Temperature [°C] Figure 16. Output Voltage vs Ambient Temperature (24V Input, ±15V Output) www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 10/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Application Examples Exercise caution with the actual system since the characteristic changes with the board layout and the types of external parts mounted, and etc. T1 3:1 VIN 24V 10µF D2 Z1 VIN 1000pF 63µH SDX/EN 47µF FB PGND REF 80.6kΩ VOUT- T1 : Sumida Electric CEP1311D-2405051R Z1 : ROHM KDZ18B D1 : ROHM 1SS400SM D2 : ROHM RB160M-40 3.9kΩ Figure 17. 24V Input, 5V Output T1 1:1:1 VIN 24V 10µF VIN Z1 BD7F100HFN-LB D1 SDX/EN 4700pF 50µH 10µF REF RDUMMY 4.7kΩ COM 470Ω 50µH D3 FB PGND VOUT+ 15V,165mA D2 50µH SW COMP AGND RDUMMY 330Ω SW COMP AGND 7µH 1kΩ D1 BD7F100HFN-LB VOUT+ 5V, 1A 10µF RDUMMY 4.7kΩ VOUT-15V, -165mA T1 : Sumida Electric CEP1311D-2415052R Z1 : ROHM KDZ18B D1 : ROHM 1SS400SM D2,D3 : ROHM RB160M-90 76.8kΩ 3.9kΩ Figure 18. 24V Input, ±15V Output T1 1:2 VIN 5V 10µF VIN Z1 BD7F100HFN-LB D1 D2 1000pF SDX/EN 40µH RDUMMY 22µF 1kΩ 1kΩ VOUT- SW COMP FB AGND 10µH VOUT+ 5V, 200mA REF PGND 13.3kΩ T1 : Sumida Electric CEP911B-0505051R Z1 : ROHM KDZ5.6B D1 : ROHM 1SS400SM D2 : ROHM RB160M-40 3.9kΩ Figure 19. 5V Input, 5V Output Table1. Recommended Transformers Size (W×L×H) [mm] LP [μH] NP : NS Vendor CEP1311D-2405051R 13.5×20.0×12.5 63 3:1 CEP911B-2405051R 10.0×10.0×11.5 63 3:1 CEP1311D-2415052R 13.5×20.0×12.5 50 CEP911B-0505051R 10.0×10.0×11.5 10 Part Number www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Target Applications VIN [V] VOUT [V] Sumida Electric 24 5 1 Sumida Electric 24 5 0.8 1:1:1 Sumida Electric 24 ±15 0.165 1:2 Sumida Electric 5 5 0.2 11/28 IOUT [A] TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Application Information 1. Outline Operation This product is an isolated type flyback converter without an optocoupler. An optocoupler or a transformer’s tertiary winding feedback circuit which was needed to obtain a stable output voltage isolated by a transformer in the conventional application becomes unnecessary, thus, the number of parts is reduced drastically, producing a small-sized and high-reliability application isolated type power supply. Furthermore, a highly efficient isolated type power supply application can easily be produced the use of the Original Adapted-Type ON-Time Control Technology which eliminates the need for external phase compensation parts. The off time is determined by comparing the reference voltage inside the IC with the information which was obtained by the feedback of the secondary output voltage through primary flyback voltage. Adapted-type ON time control, (1) Switching frequency is fixed at 400kHz (Typ) for PWM operation when the load stabilizes. (2) During load current fluctuation, the ON-Time Control will operate and the switching frequency will change, thus a high-speed load response is obtained. (3) During light load, high efficiency is obtained because the switching frequency decreases. 2. Timing Chart (1)Start-up/Shut-down Output voltage gradually turns ON through the soft start function when SDX/EN terminal rises to above 2.0V(Typ) (Enable state) .When SDX/EN terminal falls below 1.8V (Typ), output voltage turns OFF (Disable state). VIN SDX/EN (Note1) (Note1) 2V 1.8V 　tss VOUT×0.9 VOUT Figure 20. Start-up/Shut-down Timing Chart (Note 1) In the control system of this IC, it has to be operated where duty is below 50%. When turning ON/OFF the IC, control the SDX/EN terminal as enable/disable under the condition where V IN fulfills below equation. V IN  NP  VO U TV F  NS [V ] where: VIN is the VIN input power voltage Np is the number of turns in the transformer primary side Ns is the number of turns in the transformer secondary side VOUT is the output voltage VF is the forward voltage of the output diode in the secondary side If SDX/EN terminal is connected to VIN terminal, duty could be more than 50% and unexpected output voltage might occur when turning ON/OFF. Please refer to ”8. Enable Voltage” on page 16 of the application information for the enable control with VIN terminal. www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 12/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB (2) VIN Under Voltage Lock-Out (VIN UVLO) When the input voltage (VIN) falls below 2.5V (Typ), it will be detected, followed by SW terminal becomes Hi-Z then output turns OFF. When the input voltage (VIN) rises to above 2.65V (Typ), it automatically recovers thorough the soft start. (Hysteresis voltage: 0.15V (Typ)) VIN UVLO OFF VIN UVLO ON VIN 2.65V 2.5V 0V tss VOUT VOUT×0.9 SW Figure 21. VIN UVLO Timing Chart (3) Thermal Shutdown Protection (TSD) When the internal chip (Junction) temperature exceeds Tj=175°C (Typ) ,it will be detected, followed by SW terminal becomes Hi-Z, then output turns OFF. When Tj decreases below 150°C (Typ), it automatically recovers through the Soft Start. Note that the thermal shutdown circuit is designed to shutdown the IC from thermal runaway under abnormal circumstances with the temperature exceeding Tjmax = 150°C. It is not designed to protect or guarantee the application set. Please refrain from using this function as a protection design of the application set. TSD ON TSD OFF Tj=175℃ Tj=150℃ Tj tss VOUT VOUT×0.9 VIN SW Figure 22. TSD Timing Chart (4) Over Current Protection (OCP) When the peak current reaches 1.25A (Typ) during the built-in N-channel MOSFET is ON, it will be detected, followed SW terminal becomes Hi-Z, then N-channel MOSFET turns OFF. It is detected per switching cycle, and output voltage decreases as ON duty is limited. VOUT ILIMIT=1.25A IP (Primary Transformer Current) SW IOUT (Load Current) Normal Over Current Normal Figure 23. OCP Timing Chart www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 13/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB 3．Output Voltage SW terminal voltage is higher than input voltage (VIN) when the built-in N-Channel MOSFET is OFF. This primary flyback voltage (the gap between SW terminal voltage and V IN) contains the information of the secondary VF output voltage. VIN SW terminal voltage can be calculated as follows: V SW V IN N  P  VO U TV F  I S  E S R NS [V ] IS NP/NS VIN VOUT IRFB RFB FB where: VSW is the SW terminal voltage IS is the transformer current in the secondary side ESR is the total impedance in the secondary side (transformer wirewound resistance of the secondary side, PCB impedance, and etc.) SW COMPARATOR VREF 0.78V Adaptive On-Time Controller VCOMP ICOMP Driver IP Current Monitor 25kΩ REF COMP RREF CCOMP PGND RCOMP Figure 24. Control Block Diagram This primary flyback voltage is converted to the current I RFB by RFB resistor. As FB terminal voltage almost equals to VIN voltage due to the differential circuit of VIN, IRFB can be expressed by following equation: V SW V FB RFB NP  VOUT V F  I S  ESR  NS  R FB I RFB  [A ] where: IRFB is the FB input current VFB is the FB terminal voltage RFB is the external resistance between the FB-SW terminals REF terminal voltage can be expressed as follows since IRFB flows into RREF resister. V REF  R REF N P   VO U TV F  I S  E S R R FB N S [V] where: VREF is the REF terminal voltage RREF is the external resistance between the REF–AGND terminals (The IC is designed on the assumption that this value is 3.9kΩ.) The REF terminal voltage is input into the comparator and compared with the IC internal reference voltage (0.78V(Typ)). Since the loop gain of the whole system is high, the REF terminal voltage can be equal to the reference voltage in the IC. Therefore, the output voltage VOUT and the REF terminal voltage VREF are as follows: VOUT  R FB N S  V R E F V F  I S  E S R RR E F N P [V ] That is, the output voltage VOUT can be set by the primary and secondary side turns ratio of the transformer, and the ratio of the resistances RFB and RREF. VF and ESR cause an output voltage error. The feedback resistor RFB can be expressed as follows from the relative quation with V OUT : RFB  RR E F N P   VO U TV F  I S  E S R VR E F N S [Ω] VSW Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should be avoided. Resistor Transistor (NPN) Pin A Pin B C E Pin A N P+ P N N P+ N Parasitic Elements N P+ N P N P+ B N C E Parasitic Elements P Substrate P Substrate Parasitic Elements Pin B B GND Parasitic Elements GND GND N Region close-by GND Figure 32. Example of monolithic IC structure 13. Ceramic Capacitor When using a ceramic capacitor, determine the dielectric constant considering the change of capacitance with temperature and the decrease in nominal capacitance due to DC bias and others. 14. Area of Safe Operation (ASO) Operate the IC such that the output voltage, output current, and power dissipation are all within the Area of Safe Operation (ASO). 15. Thermal Shutdown Circuit (TSD) This IC has a built-in thermal shutdown circuit that prevents heat damage to the IC. Normal operation should always be within the IC’s power dissipation rating. If however the rating is exceeded for a continued period, the junction temperature (Tj) will rise which will activate the TSD circuit that will turn OFF all output pins. When the Tj falls below the TSD threshold, the circuits are automatically restored to normal operation. Note that the TSD circuit operates in a situation that exceeds the absolute maximum ratings and therefore, under no circumstances, should the TSD circuit be used in a set design or for any purpose other than protecting the IC from heat damage. 16. Over Current Protection Circuit (OCP) This IC incorporates an integrated overcurrent protection circuit that is activated when the load is shorted. This protection circuit is effective in preventing damage due to sudden and unexpected incidents. However, the IC should not be used in applications characterized by continuous operation or transitioning of the protection circuit. www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 24/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Ordering Information B D 7 F 1 0 0 H Part Number F N - Package HFN:HSON8 EFJ:HTSOP-J8 LBTR Product class LB: For industrial applications Packing, forming specification TR: Embossed tape and reel 2500pcs (HSON8) HR: Embossed tape and reel 250pcs (HSON8) E2: Embossed tape and reel 3000pcs (HTSOP-J8) H2: Embossed tape and reel 250pcs (HTSOP-J8) Marking Diagrams HSON8 (TOP VIEW) HTSOP-J8(TOP VIEW) Part Number Marking D7F Part Number Marking D 7 F 1 0 0 LOT Number 1 0 0 LOT Number 1PIN MARK 1PIN MARK Line up Package HSON8 HTSOP-J8 www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Orderable Part Number BD7F100HFN-LBTR BD7F100HFN-LBHR BD7F100EFJ-LBE2 BD7F100EFJ-LBH2 25/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Physical Dimension, Tape and Reel Information Package Name www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 HSON8 26/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Physical Dimension, Tape and Reel Information Package Name www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 HTSOP-J8 27/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 BD7F100HFN-LB BD7F100EFJ-LB Revision History Date Revision 4.Sep.2015 001 29.Jun.2016 002 17.April.2017 003 Changes New production P.8 Typical Performance Curves Figure.9 modification P.9 Typical Performance Curves Figure.11 modification P.14 Output Voltage feedback resistance RFB formula modification P.15 (2) Primary Side Inductance LP addition P.22 I/O equivalent circuits 3.COMP, 4.REF, 5.FB update P.4 Modified FB terminal absolute voltage P.25 Add small lots format P.26 P.27 Add small lots format www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 28/28 TSZ02201-0J1J0AJ00910-1-2 17.Apr.2017 Rev.003 Notice Precaution on using ROHM Products 1. (Note 1) If you intend to use our Products in devices requiring extremely high reliability (such as medical equipment , aircraft/spacecraft, nuclear power controllers, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific Applications. (Note1) Medical Equipment Classification of the Specific Applications JAPAN USA EU CHINA CLASSⅢ CLASSⅡb CLASSⅢ CLASSⅢ CLASSⅣ CLASSⅢ 2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. Our Products are not designed under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation 4. The Products are not subject to radiation-proof design. 5. Please verify and confirm characteristics of the final or mounted products in using the Products. 6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in the range that does not exceed the maximum junction temperature. 8. Confirm that operation temperature is within the specified range described in the product specification. 9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / Circuit board design 1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products, please consult with the ROHM representative in advance. For details, please refer to ROHM Mounting specification Notice-PAA-E © 2015 ROHM Co., Ltd. All rights reserved. Rev.003 Precautions Regarding Application Examples and External Circuits 1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics. 2. You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. Therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. Precaution for Electrostatic This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control). Precaution for Storage / Transportation 1. Product performance and soldered connections may deteriorate if the Products are stored in the places where: [a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [b] the temperature or humidity exceeds those recommended by ROHM [c] the Products are exposed to direct sunshine or condensation [d] the Products are exposed to high Electrostatic 2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period. 3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of which storage time is exceeding the recommended storage time period. Precaution for Product Label A two-dimensional barcode printed on ROHM Products label is for ROHM’s internal use only. Precaution for Disposition When disposing Products please dispose them properly using an authorized industry waste company. Precaution for Foreign Exchange and Foreign Trade act Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign trade act, please consult with ROHM in case of export. Precaution Regarding Intellectual Property Rights 1. All information and data including but not limited to application example contained in this document is for reference only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. 2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the Products with other articles such as components, circuits, systems or external equipment (including software). 3. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any third parties with respect to the Products or the information contained in this document. Provided, however, that ROHM will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the Products, subject to the terms and conditions herein. Other Precaution 1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM. 2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of ROHM. 3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the Products or this document for any military purposes, including but not limited to, the development of mass-destruction weapons. 4. The proper names of companies or products described in this document are trademarks or registered trademarks of ROHM, its affiliated companies or third parties. Notice-PAA-E © 2015 ROHM Co., Ltd. All rights reserved. Rev.003 Datasheet General Precaution 1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents. ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny ROHM’s Products against warning, caution or note contained in this document. 2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s representative. 3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. Notice – WE © 2015 ROHM Co., Ltd. All rights reserved. Rev.001