ncp5604 ON Semiconductor, ncp5604 Datasheet
ncp5604
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ncp5604 Summary of contents
Page 1
... Driver The NCP5604A and NCP5604B products are multiple output LED drivers dedicated to the display back light. The NCP5604A drives LEDs, the NCP5604B version being dedicated to the three LED applications. The two parts share a common built-in DC/DC converter, based on a charge pump structure, including the new 1.33X mode of operation, improving the efficiency over the full input battery supply voltage span over 90% ...
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... NCP5604A, NCP5604B Vbat C4 GND 4.7 mF/6 VBAT 2 CONTROL IREF 100 k GND 4 AGND 9 PGND Figure 1. Typical Multiple White LED Driver http://onsemi.com 220 nF/ C2N 13 C2P 11 C1P U1 NCP5604A 10 C1N 12 VOUT LWY87S LWY87S D2 LWY87S D1 LWY87S 2 GND ...
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... Vbat C4 1 GND 4.7 mF/ DIGITAL CONTROL R1 GND 3 100 k ANALOG CONTROL 4 AGND OVERTEMPERATURE Figure 2. NCP5604A Simplified Block Diagram NCP5604A, NCP5604B 220 nF 220 nF 220 CHARGE PUMP DC-DC CONVERTER OVERVOLTAGE Vbat http://onsemi.com mF/10 V Vout PGND ...
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... Vbat C4 1 GND 4.7 mF/ DIGITAL CONTROL R1 GND 3 100 k ANALOG CONTROL 4 AGND OVERTEMPERATURE Figure 3. NCP5604B Simplified Block Diagram (Pin 5 disconnected) NCP5604A, NCP5604B 220 nF 220 nF 220 CHARGE PUMP DC-DC CONVERTER OVERVOLTAGE Vbat http://onsemi.com mF/10 V Vout ...
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... This pin is the GROUND signal for the analog and digital blocks and must be connected to the system ground. NCP5604A: This pin sinks to ground and monitors the current flowing into the fourth LED, intended to be used in backlight application. The current is limited maximum (Note 2) ...
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... This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM): JESD22-A114. Machine Model (MM): JESD22-A115. 5. The maximum package power dissipation limit must not be exceeded. 6. Latchup current maximum rating: " 100 mA per JEDEC standard: JESD78. 7. Moisture Sensitivity Level (MSL): per IPC/JEDEC standard: J-STD-020A. NCP5604A, NCP5604B Symbol V BAT Vout EN ...
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... LED1 to LED4 = 25 mA 3.3 V (Total = 100 mA), Vbat = 3 The total output current is evenly distributed across the external LED. 9. LED4 is not connected in the NCP5604B version. 10. The NCP5604B controls total in the three current mirrors, the extra 25 mA available current from the DC-DC converter being available for external purpose. NCP5604A, NCP5604B = +25° ...
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... Figure 4). In any case, no voltage shall be forced at I pin, either downward or upward. The reference current is multiplied by the constant k = 260 to yield the output load current. Since the reference NCP5604A, NCP5604B = +25°C, Min & Max values are referenced -40°C to +85°C ambient A Rating pin voltage either higher or lower than the 600 mV specified ...
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... Vbat (V) Figure 7. Typical LED to LED Current Matching at I Maximum NCP5604A, NCP5604B LOAD CONNECTION The NCP5604A chip is capable of driving the four LED Iout = 28mA simultaneously, as depicted in Figure 1, but the load can be Iout = 80mA arranged to accommodate one or two LED if necessary in the application (see Figure 8). The four current mirror can be connected in parallel to drive a single powerful LED, thus yielding 100 mA current capability in a single LED ...
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... PGND C1N VOUT D3 LWY87S Figure 9. Using the NCP5604B to Drive a Three LED Layout Finally, an external network can be connected across Vout and ground, but the current through such network will not be regulated by the NCP5604A chip (see Figure 10). On top of that, the total current out of the Vout pin shall be limited to 100 mA ...
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... Hz to 200 Hz band, or above the audio band (25 kHz and beyond) to make sure the dimming can be adjusted from zero to 100% without any audible noise matter of fact, the NCP5604A has been designed to guarantee 200 kHz PWM at the ENABLE pin. The current mirror can be largely improved by using an ...
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... The waveforms given in Figure 16 illustrate the functional operation. Similarly, the input current is limited 300 mA peak (typical) as depicted in Figure 17. Figure 16. Output Short Circuit Operation NCP5604A, NCP5604B Figure 17. Input Current Short Circuit Operation I =80 mA out I ...
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... NCP5604A, NCP5604B 220 nF/10 V 220 nF/ C3P U1 NCP5604 16 C3N S2 ENABLE VCC GND C5 GND 4.7 mF/6 POWER GND + + + Adjust PWM VCC Figure 19. Demo Board Schematic Diagram C4 GND 4.7 mF/ LED1 7 LED2 6 LED3 5 LED4 GND TP1 VREF GND R1 GND GND 330 k R2 BSS138 GND 6 ...
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... NCP5604A, NCP5604B Figure 20. Silk View Top Layer Figure 21. Demo Board Printed Circuit Layout http://onsemi.com 14 ...
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... PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com NCP5604A, NCP5604B PACKAGE DIMENSIONS WQFN16 MT SUFFIX CASE 488AK-01 ISSUE ...