ncp1840 ON Semiconductor, ncp1840 Datasheet
ncp1840
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ncp1840 Summary of contents
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... Application Specific Solution from ON Semiconductor NCP1840 The NCP1840 is a general purpose LED driver with the ability to drive up to eight LEDs. Each of the eight driver currents is fully programmable, each utilizing a 5−bit current DAC. The current can be turned on or off using a programmable 6−bit counter. The full−scale current of all eight current DACs is set by an external resistor on the R_IDAC pin ...
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Figure 1. Block Diagram and Typical Application http://onsemi.com 2 ...
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PIN FUNCTION DESCRIPTION Pin No. Pin Name 1 CP0 ULED1 to ULED8 6 GND SCL 9 SDA 10 R_IDAC 15, (21) GND 16, 17, 19, 20 C2M, C1M, C2P, and ...
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... The NCP1840 is programmed through frame. The NCP1840 is a slave only part, data can be written to or read from the part. The max speed clock for the serial 2 interface is 400 kHz pins SCL and SDA require external pull-up resistors around 1.3 kW. ...
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Par t Address Control TAR T WRITE ACK CONTROL BITS: A CB2 CB1 CB0 0 0 ...
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REGISTER DESCRIPTION 1. ULEDx – CURRENT LEVEL REGISTER DATA7 DATA6 DATA5 DATA4 ...
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The initial target for LED period is ~2 kHz – If this period is used, a PWM code 1 Y7.937 period of 500 ms. Code 62 Finally a code 63 would have an “ON” duty cycle equal ...
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... The power dissipation level is maximum allowed power dissipation for particular package or power dissipation at which the junction temperature reaches its maximum operating value, whichever is lower. NCP1840 LAYOUT GUIDELINES The NCP1840 requires a low-inductance ground. Charge pump capacitors C0, C1 and C2 and decoupling capacitor CBAT should be as close to the part as possible. GROUND CONNECTION: Connect pin 6 and pin 15 to the “ ...
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CHARGE PUMP CAPACITORS Use good-quality X5R or X7R ceramic capacitors for C 2. Connect the positive end the output of the charge pump, as close to the IC as possible to ensure charge pump 0 ...
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... COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. MILLIMETERS DIM MIN MAX A 0.80 1.00 A1 --- 0.05 A3 0.20 REF L b 0.20 0.30 D 4.00 BSC D2 2.60 2.90 E 4.00 BSC E2 2.60 2.90 e 0.50 BSC K 0.20 REF L 0.35 0.45 L1 0.00 0.15 4.30 20X 0.58 2.88 2.88 4.30 0.50 PITCH DIMENSIONS: MILLIMETERS ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCP1840/D ...