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NCP5890
ANALOG SECTION: (Typical values are referenced to T A = +25 ° C, Min & Max values are referenced ? 40 ° C to +85 ° C ambient
temperature, unless otherwise noted), operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.
Pin
7
6
Symbol
I REF
I PK
Rating
Reference Current @ Vref = 1144 mV (Note 8)
Reference Current @ Vref = 1144 mV (Note 8)
Min
1
1
Typ
Max
100
100
Unit
m A
m A
k ref
k pk
Reference Current to ILED peak current ratio
Reference Current to Inductor peak current ratio
250
9700
7
6
9
9
10, 11, 12
4
V REF
V REFK
V FB
M DCY
I LKGM
Fpwm
F LF
V VSD
Reference Voltage (Note 8)
Reference Voltage (Note 8)
Feedback Voltage @ ILED = 25 mA (Note 9)
Boost Operating Maximum Duty Cycle (0 ° C < T A < 85 ° C)
Current Mirror Leakage Current
Low Frequency PWM Clock (derived from F pwr /8192)
Low Frequency Clock (derived from F pwr /8192)
Photo sense bias supply @ Ibias = 1 mA
? 3%
? 10%
90
140
0.6
2.5
1144
1144
425
94
160
+3%
+10%
200
185
20
Vbat
mV
mV
mV
%
nA
Hz
Hz
V
4
4
5
10
11
12
R VSD
I SDUSD
G AMB0.25
G AMB0.50
G AMB01
G AMB02
G AMB04
V iph
BVpwm2
BVpwm2
BVpwm1
Photo sense bias supply internal impedance
Photo sense leakage current (Note 11)
Photo sense internal Gain 1/4
Photo sense internal Gain 1/2
Photo sense internal Gain 1
Photo sense internal Gain 2
Photo sense internal Gain 4
Photo sense input voltage (Note 10)
Breakdown Voltage pin 10 to pin 10 (Note 11)
Breakdown Voltage pin 11 to Pin 12 (Note 11)
Breakdown voltage pin 12 to GND (Note 11)
9
9
9
30
0.25
0.5
1
2
4
100
1.5
W
nA
V
V
V
V
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 I REF or I PK pin voltage either higher or lower than the specified voltage. The reference voltage applies
to both I REF and I PK pins.
9. This parameter guarantees the function for production test purposes.
10. The ambient sense linearity is guaranteed when the voltage at the output of the internal amplifier is limited to 1.5 V. This voltage is equal to the
input voltage times the programmed gain. Beyond this value, the operational amplifier is in the saturation region and the linearity is no longer
guaranteed.
11. Parameter guaranteed by design, not tested in production.
DIGITAL PARAMETERS SECTION: (Typical values are referenced to Ta = +25 ° C, Min & Max values are referenced ? 40 ° C to +85 ° C
ambient temperature, unless otherwise noted), operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.
Pin
1
Symbol
F SCK
Input I2C clock frequency
Rating
Min
Typ
Max
400
Unit
kHz
1,2
1,2
2
3
3
V IH
V IL
C IN
V IHD
V ILD
Positive going Input High Voltage Threshold, SCL, SDA signals
Negative going Input High Voltage Threshold, SCL, SDA signals
SDA Input Capacitance
I2C address extension
I2C address extension
1.6
0
Vbat*0.7
0
10
V BAT
0.4
15
Vbat+0.3V
0.3
V
V
pF
V
V
NOTE:
Digital inputs undershoot < ? 0.30 V to ground, Digital inputs overshoot < 0.30 V to V BAT
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