BD8160AEFV Rohm, BD8160AEFV Datasheet
BD8160AEFV
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BD8160AEFV Summary of contents
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... BD8160AEFV ●Description The BD8160AEFV is a system power supply for the TFT-LCD panels used for liquid crystal TVs. Incorporates two high-power FETs with low on resistance for large currents that employ high-power packages, thus driving large current loads while suppressing the generation of heat. A charge pump controller is incorporated as well, thus greatly reducing the number of application components. ● ...
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... BD8160AEFV ●Electrical characteristics (unless otherwise specified VIN=12V and Ta=25°C) 1. DC/DC converter controller block Parameter Soft start – source current Error amplifier block – FB and FBB FB and FBB input bias current Feedback voltage for boost converter Feedback voltage for buck converter SW block – SW ...
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... BD8160AEFV ●Electrical characteristics (unless otherwise specified VIN=12V and Ta=25°C) 3. General Parameter Supply current Average supply current Oscillator Oscillation frequency1 Oscillation frequency2 Protections Under voltage lockout threthold1 Under voltage lockout threthold2 Thermal Shutdown Short Circuit Protection Time 1 Short Circuit Protection Time 2 FB threshold1 for SCP ...
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... BD8160AEFV ●Reference Data (Unless otherwise specified 25°C) 5 4.8 4.6 4.4 4 VIN : [V] Fig.1 SUPPLY CURRENT 1.217 1.216 1.215 1.214 1.213 1.212 1.211 1.210 1.209 1.208 1.207 -40 -30 -20 - [℃] Fig.4 REF VOLTAGE 7 6.8 6.6 6.4 6.2 6 5.8 5.6 5.4 5.2 5 -40 -30 -20 - [℃ ...
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... BD8160AEFV ●Reference Data (Unless otherwise specified 25°C) 0.3 0.25 0.2 0.15 0.1 0.05 0 -40 -30 -20 - [℃] Fig.13 SWB ON RESISTANCE VS SW Fig.16 OVP WAVEFORM 100 500kHz 90 80 750kHz 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 Iout [A] Fig.19 STEP DOWN EFFICIENCY www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. ...
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... BD8160AEFV ●Block Diagram REF FREQ SS FB COMP FBB EN1 EN2 FBP FBN DLY 1 DLY 2 ●Typical Application VIN 12V Boostout C40 4*10μF C18 1μF D4D5 VGL C2 DAN217U -5V/50mA 0.022μ 51k 4.7μF R4 10k C9 0.047μF C3 0.1μF ○ EN1 terminal should be pulled-up to VIN terminal. ...
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... BD8160AEFV ●Pin Assignment Diagram ●Pin Assignment and Pin Function Pin No. Pin name 1 FB Feedback input 1 for VS 2 COMP Error amp output 3 OS Output sense pin 4 SW Switching pin for Switching pin for VS 6 PGND Ground pin 7 PGND Ground pin 8 SUP ...
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... BD8160AEFV ●Block Operation VREG A block to generate constant-voltage for DC/DC boosting. VREF A block that generates internal reference voltage of 2.9 V (Typ.). TSD/UVLO TSD (Thermal shutdown)/UVLO (Under Voltage Lockout) protection block. The TSD circuit shuts down IC at 175°C (Typ.) The UVLO circuit shuts down the IC when the Vcc (Typ.) or below. ...
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... BD8160AEFV ●Start-up Sequence The DC/DC converter of this IC incorporates a soft start function, and the charge pump incorporates a delay function, for which independent time settings are possible through external capacitors. As the capacitance, 0.01 µF to 0.1 µF is recommended. If the capacitance is set lower than 0.01 µF, the overshooting may occur on the output voltage. If the capacitance is set larger than 0.1 µ ...
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... BD8160AEFV ●Short Circuit Protection BD8160AEFV has a short circuit protection feature to prevent the large current flowing when the output is shorted to GND. This function is monitoring operating properly (when the output voltage was lower than expected) After TBD ms (Typ) of this abnormal state, BD8160AEFV will shutdown the all outputs and latch the state. ...
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... BD8160AEFV ●Selecting Application Components (1) Output LC constant (Boost Converter) The inductance L to use for output is decided by the rated current ILR and input current maximum value IOMAX of the inductance Fig. 29 Adjust so that IOMAX + ∆IL does not reach the rated current value ILR. At this time, ∆IL can be obtained by the following equation ...
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... BD8160AEFV (3) Phase compensation Phase Setting Method The following conditions are required in order to ensure the stability of the negative feedback circuit. Phase lag should be 150° or lower during gain 1 (0 dB) (phase margin of 30° or higher). Because DC/DC converter applications are sampled using the switching frequency, the overall GBW should be set to 1/10 the switching frequency or lower. The target application characteristics can be summarized as follows: ...
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... DLS (6) Negative-side Charge Pump Settings BD8160AEFV incorporates a charge pump controller for negative voltage, thus making it possible to generate stable gate voltage. The output voltage is determined by the following equation. As the setting range, 10kΩ to 330kΩ is recommended. If the resistor is set lower than 10kΩ, it causes reduction of power efficiency set more than 330kΩ, the offset voltage becomes larger by the input bias current of 0.1µ ...
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... BD8160AEFV ●Selecting the Feedforward Capacitor (Boost Converter) Across the upper resistor bypass capacitor is needed to have a stable converter loop will set a zero in the loop together with R 1 L=10µ COMP 2 2 Fig.39 The regulator loop can be compensated by adjusting the exfernal components connected to the COMP pin. ...
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... BD8160AEFV ●I/O Equivalent Circuit Diagram 18.SWB Vcc PVcc 2.COMP 24.REF Vcc VR 9.EN2 12.FREQ 16.EN1 3.OS www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 17.BOOT REG SW 1.FB 13.FBN 14.FBP 15.FBB VR 10.DRP 11.DRN Vo1 Fig.41 15/18 Technical Note www.DataSheet4U.com 25.DLY1 26.DLY2 28.SS Vcc 27.GD 4.SW 5.SW 2009.07 - Rev.B ...
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... BD8160AEFV ●Notes for use 1) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety measure such as a fuse should be implemented when use of the special mode where the absolute maximum ratings may be exceeded is anticipated ...
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... BD8160AEFV ●Power Dissipation (4)4700mW 5000 4000 (3)3300mW 3000 (2)1850mW 2000 (1)1450mW 1000 AMBIENT TEMPERATURE: Ta [°C] www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved 70 1.6 mm glass epoxy PCB (1) 1-layer board (Backside copper foil area 0 mm 0 mm) (2) 2-layer board (Backside copper foil area 15 mm 15 mm) (3) 2-layer board (Backside copper foil area 70 mm ...
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... BD8160AEFV ●Ordering part number Part No. Part No. HTSSOP-B28 9.7±0.1 (MAX 10.05 include BURR) (5.5) 4° 1PIN MARK 0.625 S 0.08 S 0.65 +0.05 0.24 -0.04 0.08 M www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved Package EFV : HTSSOP-B28 <Tape and Reel information> Tape Embossed carrier tape (with dry pack) + 6° ...
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... ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing ...