el7583 Intersil Corporation, el7583 Datasheet
el7583
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el7583 Summary of contents
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... Data Sheet 3-Channel DC/DC Converter The EL7583 is a 3-channel DC/DC converter IC which is designed primarily for use in TFT-LCD applications. It features a PWM boost converter with 2.7V to 14V input capability and 5V to 17V output, which powers the column drivers and provides up to 470mA @ 12V, 370mA @ 15V from 5V supply ...
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... Feedback Input Bias Current I(DRVP) RMS DRVP Output Current ILR_V Load Regulation ON F Charge Pump Frequency PUMP 2 EL7583 = 25°C) Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Die Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125°C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85° 100kΩ ...
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... Logic Low Bias Current IL(ENBN) Logic High Bias Current IL(ENP) Logic High Bias Current OVER-TEMPERATURE PROTECTION T Over-temperature Threshold OT T Over-temperature Hysteresis HYS 3 EL7583 = 100kΩ 12V 25°C Unless Otherwise Specified (Continued) BOOST OSC A CONDITIONS ) OFF input voltage (normally connected to V DDN Usually connected to V ...
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... VREF 18 ENBN 19 ENP 20 ROSC 4 EL7583 S Ground for DC/DC boost and reference circuits; chip substrate I Soft-start input; the capacitor connected to this pin sets the current limited start time I Voltage feedback input for boost circuit; determines boost output voltage Positive supply input for DC/DC boost circuits ...
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... I (mA) OUT FIGURE 3. EFFICIENCY vs I 970 R 969 968 967 966 965 964 963 962 3 3.5 4 4.5 V (V) DDB FIGURE EL7583 5V 600 700 800 OUT 5V 600 700 800 OUT = 61.9kΩ OSC 1.265 1.255 5 5.5 6 DDB 95 90 12V 85 15V 80 75 ...
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... I (mA) OUT FIGURE 9. LOAD REGULATION 12V DDP (mA) LOAD FIGURE 11 EL7583 (Continued) 12V 9V 500 600 700 OUT 9V 12V 500 600 700 OUT V = 15V DDP f=675kHz, V =3.3V IN 1.5 1.0 0.5 0.0 -0 ...
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... FIGURE 13 100K & 0.1µF DELAY NETWORK ON ENP, C 5V/DIV 10V/DIV 2V/DIV 200ms/DIV FIGURE 15. POWER-DOWN V =3.3V, V =11.3V, I =50mA IN OUT OUT FIGURE 17. LX WAVEFORM - DISCONTINUOUS MODE 7 EL7583 (Continued) 300 350 400 450 OSC =0.1µ BOOST OFF SWITCHING PERIOD(µs)=0.0118 R OSC 6 ...
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... FIGURE 19. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE Functional Block Diagram FBB MAX_DUTY R OSC R 3 REFERENCE 62kΩ V GENERATOR REF V RAMP ENBN 8 EL7583 (Continued) 100 125 150 FIGURE 20. PACKAGE POWER DISSIPATION vs AMBIENT 110kΩ 1 49Ω 13kΩ 0.1µF V PWM COMPARATOR START-UP ...
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... Boost Converter The boost converter operates in constant frequency pulse- width-modulation (PWM) mode. Quiescent current for the EL7583 is only 5mA when enabled, and since only the low side MOSFET is used, switch drive current is minimized. 90% efficiency is achieved in most common application operating conditions. ...
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... Output Capacitor The EL7583 is specially compensated to be stable with capacitors which have a worst-case minimum value of 10µF at the particular V requirements also determine the minimum value and the . L type of capacitors. Output ripple voltage consists of two ...
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... ON If additional stage is required, the LX switching signal is recommended to drive the additional charge pump diodes. The drive impedance at the LX switching is typically 220mΩ. The figure below illustrates an implementation for two-stage positive charge pump circuit. 11 EL7583 OSC + - 40Ω FOR 12V ...
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... OFF OUT ONN ONP Similar to positive charge pump, if additional stage is required, the LX switching signal is recommended to drive the additional charge pump diodes. The figure on the next page shows a two stage negative charge pump circuit. 12 EL7583 V BOOST (5V-17V) C CPP C OUT1 FBP + - ) - 2 × ...
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... PGND pins. • Locate feedback dividers close to their respected feedback pins to avoid switching noise coupling into the high impedance node. • Switching output PCB traces should not cross laid out adjacent to, feedback traces without using a grounded 13 EL7583 5V-17V V LX ONP C CPN ...
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... OPEN 22µ 10µF 4.7µF GND V OFF (-6V@ 15mA 154K 0.1µF 3.3µ MBRM120LT3 ** BAT54S 14 EL7583 1 V ROSC SSB ENP 0.1µF 3 FBB ENBN VREF DDB C 49.9 6 0.1µ PGND D1 PGND L1 7 ...
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... TSSOP Package Outline Drawing 15 EL7583 FN7335.5 May 12, 2006 ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 16 EL7583 FN7335.5 May 12, 2006 ...