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NCP5604AMTR2G Datasheet(PDF) 9 Page - ON Semiconductor |
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NCP5604AMTR2G Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 15 page NCP5604A, NCP5604B http://onsemi.com 9 Figure 5. Typical IOUT Tolerance as a Function of the VBAT Supply Iout drift versus Vbat −5 −4 −3 −2 −1 0 1 2 3 4 5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Vbat(V) Iout = 28mA Iout = 80mA Figure 6. Typical LED to LED Current Matching at Low IREF Iref = 5 mA 0 1 2 3 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Vbat (V) −40 5C 25 5C 85 5C Figure 7. Typical LED to LED Current Matching at IREF Maximum Iref = 100 mA 0 1 2 3 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Vbat (V) −40 5C 25 5C 85 5C LOAD CONNECTION The NCP5604A chip is capable of driving the four LED simultaneously, as depicted in Figure 1, but the load can be 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. 12 5 6 7 8 GND 12 5 6 7 8 GND Figure 8. Typical Single and Double LED Connections The applications using three LED shall use the NCP5604B version to make profit of the highest efficiency (see Figure 9). In this case, LED4 is not connected and pin 5 is internally unconnected. |
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