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NCP5608 Datenblatt(Datasheet) 6 Page - ON Semiconductor

Teile-Nr. NCP5608
Beschreibung  Multiple LED Charge Pump Driver
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Hersteller  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP5608
http://onsemi.com
6
POWER SUPPLY SECTION (Typical values are referenced to TA = +25°C, Min & Max values are referenced −40°C to +85°C ambient
temperature, unless otherwise noted.)
Pin
Symbol
Rating
Min
Typ
Max
Unit
19, 24
PVbat,
AVbat
Power Supply
2.7
5.5
V
18
Iout
Continuous DC Current in the Load @ Vout = 8xLED, Vbat = 3.4 V
500
mA
18
Isch
Continuous Output Short Circuit Current
60
120
mA
18
Vout
Output Voltage Compliance (OVP)
4.8
5.5
V
24
Istdb
Standby Current, @ Iout = 0 mA, @ 2.7 V < Vbat < 4.2 V
5.0
mA
19
Iop
Operating Current, @ Iout > 0 mA
PVbat = 3.6 V
PVbat = 4.2 V
0.5
0.8
mA
Fpwr
Charge Pump Operating Frequency (Any CFLY Capacitor Pins)
1.3
MHz
7, 8, 9, 10
IMAT
Output LED to LED Current Matching,
@ Vbat = 3.6 V, ILED = 20 mA, LED1 to LED4 are Identical
2.0
"0.5
2.0
%
7, 8, 9, 10
ITOL
Output Current Tolerance, LED1 to LED4
@ Vbat = 3.6 V, ILED = 20 mA
"2.0
%
11, 12, 14,
15
IMAT
Output LED to LED Current Matching,
@ Vbat = 3.6 V, ILED = 80 mA, LED5 to LED8 are Identical
2.0
"0.5
2.0
%
11, 12, 14,
15
ITOL
Output Current Tolerance, LED5 to LED8
@ Vbat = 3.6 V, ILED = 80 mA
"2.0
%
18
tstart
DC−DC Start Time (Cout = 4.7 mF )
− from Vbat Operating to Full Load Operation
150
ms
TSD
Thermal Shutdown Protection
160
°C
TSDH
Thermal Shutdown Protection Hysteresis
30
°C
ANALOG SECTION (Typical values are referenced to TA = +25°C, Min & Max values are referenced −25°C to +85°C ambient
temperature, unless otherwise noted.)
Pin
Symbol
Rating
Min
Typ
Max
Unit
3
IREFBK
Backlight Reference Current @ Vref = 600 mV (Notes 7, 8)
1.0
100
mA
3
Reference Current (IREF) to Backlight Ratio
40
2
IREFFL
Flash Reference Current @ Vref = 600 mV (Notes 7, 8)
1.0
100
mA
2
Reference Current (IREF) to Flash Ratio
40
4, 5
Cin
Input Capacitance (Parameter not tested, guaranteed by design)
10
pF
7. The overall output current tolerance depends upon the accuracy of the external resistor. Using 1% or better resistor is recommended.
8. The external circuit must not force the IREF pin voltage either higher or lower than the 600 mV specified.
DIGITAL PARAMETERS SECTION @ 2.70 V
v VCC v 5.5 V (TA = −25°C to +85°C unless otherwise noted.)
Note: Digital inputs undershoot
v −0.30 V to ground. Digital inputs overshoot v 0.30 V to VCC.
Pin
Symbol
Rating
Min
Typ
Max
Unit
5
FCLK
Input I2C Clock, Duty Cycle = 50%
400
kHz
4, 5
VIH
Positive−Going Input High Voltage Threshold (SDA, SCL)
0.7
VCC
Vcc + 0.5 V
V
4, 5
VIL
Negative−Going Input High Voltage Threshold (SDA, SCL)
0
0.4
V
9. The VCC Bias pins can be either left open, or biased by the same voltage as the external MCU power supply source. An external 10 nF capacitor
might be necessary to improve the I2C function when operating with SDA and SCL signal amplitude below 1.8 V.
10. Expernal pullup resistors shall be connected to properly bias the SDA and SCL logic levels according to the I2C specifications.




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