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4
Table 1. Shift Register Bits Assignment and Functions
SetReg shift register (Note: The register content is latched upon CS positive going).
B7 B6 B5 B4 B3 B2 B1
Bn Value After POR 0 0 0 0 0 0 0
Iout Peak (mA) I
ref
*k*7.5 I
ref
*k*6.5 I
ref
*k*5.5 I
ref
*k*4.5 I
ref
*k*3.5 I
ref
*k*2.5 I
ref
*k*1.5
LOCAL CLOCK CS B1−B7 Output Current
L X H X 0
L X L X I
ref
* k
H or Open X H No Change I
ref
* k * (Bn + 0.5)
H or Open L No Change I
ref
* k * (Bn + 0.5)
H or Open L Q
data
Bn I
ref
* k * (Bn + 0.5)
The register is clear to 0 during the first 20 ns following the CS falling edge.
Note:
Coefficient Value (internal ratio): k = 746
Maximum output peak current @ B7 = 1 and Iphoto = 0 mA :Iout peak = I
ref
* (7 + 0.5) * 746 = I
ref
* 5595
I
ref
+
V
ref
R1
+
1.24 V
R1
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply V
bat
, V
BIAS
7.0 V
Output Power Supply Voltage Compliance V
L2
16 V
Digital Input Voltage
Digital Input Current
CLK, CS −0.3 tV tV
bat
+ 3.0 V
1.0
V
mA
Human Body Model: R = 1500 W, C = 100 pF ESD "2.0 kV
Machine Model ESD "200 V
Micro 10 Package
Power Dissipation @ T
A
= +85°C
Thermal Resistance, Junction−to−Air
P
D
R
Thja
200
200
mW
°C/W
Operating Ambient Temperature Range T
A
−25 to +85 °C
Operating Junction Temperature Range T
J
−25 to +125 °C
Maximum Junction Temperature T
Jmax
+150 °C
Storage Temperature Range T
stg
−65 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
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5
POWER SUPPLY SECTION (−25°C to +85°C ambient temperature, unless otherwise noted.)
Rating Pin Symbol Min Typ Max Unit
Power Supply 10 V
bat
2.7 6.0 V
Power Supply Threshold Startup Voltage 10 V
batThr
2.3 2.7 V
Output Load Voltage Compliance 8 V
out
15.0 V
Pulsed Current Regulation Range 8 I
out
0 400 mA
Continuous DC Current in the Load 8 I
out
75 mA
Output Pulsed Current Tolerance @ V
bat
= 3.6 V, L1 = 22 mH/0.71 W,
R
ref
"1%, I
LED
= 20 mA (Note 1)
8 I
out
"5.0 %
Output Leakage @ LOCAL = 0, CS = H, Vout = 15 V, V
bat
= 6.0 V 8 I
out
500 nA
Standby Current @ Iout = 0 mA, CS = H, CLK = H, V
bat
= V
BIAS
= 3.6 V 10 I
stdb
3.0 mA
Standby Current @ Iout = 0 mA, CS = H, CLK = H, V
bat
= V
BIAS
= 6.0 V 10 I
stdb
10 mA
Operating Current @ V
bat
= V
BIAS
= 3.6 V, I
ref
= 30 mA, CLK = H, CS = L,
LOCAL = Open
10 I
ope
600
mA
Boost Internal Oscillator Clock @ L1 = 22 mH, V
bat
= V
BIAS
= 3.6 V,
Iout = 20 mA (Vout = 14 V)
F
osc
300 kHz
1. The tolerance refers to the 20 mA to 70 mA current range.
DIGITAL SECTION (−25°C to +85°C ambient temperature, unless otherwise noted.)
Rating Pin Symbol Min Typ Max Unit
High Level Input Voltage (Note 2)
Low Level Input Voltage (Note 2)
Input Capacitance
3, 5 V
IH
V
IL
C
in
0.7*V
bat
10
V
bat
0.3*V
bat
V
V
pF
High Level Input Voltage (Note 2)
Low Level Input Voltage (Note 2)
Input Capacitance
6 V
IH
V
IL
C
in
0.6*V
bat
0.4*V
bat
10
V
V
pF
LOCAL Pullup Resistor 6 R
loc
20 80 kW
LOCAL Leakage Current 9 I
Loc
100 nA
CS Pullup Resistor 3 R
cs
20 80 kW
Minimum CS Low Time 3 Tc s
setup
250 ns
Clock Frequency 5 F
CLK
5.0 MHz
CLOCK tr and tf 5 tr
CLK
, tf
CLK
10 ns
Internal Register Clear t
clear
10 30 ns
Internal Power on Reset Width t
POR
100 ms
2. Digital inputs undershoot < − 0.30 V, Digital inputs overshoot < 0.30 V.
ANALOG SECTION (−25°C to +85°C ambient temperature, unless otherwise noted.)
Rating Pin Symbol Min Typ Max Unit
Output Voltage Range Reference @ 2.5 mA < I
ref
< 65 mA (Note 3) 1 V
ref
1.20 1.24 1.28 V
Maximum Output Current Range Ratio 8 I
out
5595
Minimum Output Current Range Ratio 8 I
out
1119
Output Current Sense Resistor 10, 9 R
s
1.8 5.0 W
Output Voltage Range Reference @ 2.5 mA < Ipho < 65 mA 2 V
pho
1.20 1.24 1.28 V
Output Current Stabilization tdelay following a DC/DC startup 8 I
outdly
100 ms
Internal NMOS Resistor @ V
bat
= 3.6 V 8 QR
DSON
2.2 3.0 W
Internal Comparator Delay Time Td
comp
60 ns
3. The overall tolerance depends upon the accuracy of the external resistor. Using a 1%/low PPM metal film resistor is recommended to achieve
"5% output current tolerance.
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6
50
55
60
65
70
75
80
0 5 10 15 20 25 30 35
EFFICIENCY (%)
Figure 3. Efficiency vs. Load Current @ 4 LEDS
(V
load
= 4*Vf 14.2 V)
Figure 4. Efficiency vs. Load Current @ 3 LEDS
(V
load
= 3*Vf 10.5 V)
Figure 5. Efficiency vs. Load Current @ 2 LEDS
(V
load
= 2*Vf 7.1 V)
60
65
70
75
80
85
0 5 10 15 20 25 30 35
Figure 6. Efficiency vs. V
bat
@
V
out
= 15 V/I
led
= 20mA and
V
out
= 7.5 V/I
led
= 40 mA
Figure 7. Efficiency vs. Load Current @ 4 LEDS
(V
load
= 2 strings of 2 LEDs in series = 7.1V)
Figure 8. Inductor peak Current vs.
I
ref
@ Bn = {1, 2, 3, 4, 5, 6, 7}
0
50
100
150
200
250
300
350
400
0 2040608
0
I
ref
(mA)
V
bat
= 3.6 V
V
bat
= 4.2 V
V
bat
= 3.0 V
I
LED
(mA)
50
55
60
65
70
75
80
0 5 10 15 20 25 30 3
5
EFFICIENCY (%)
I
LED
(mA)
EFFICIENCY (%)
I
LED
(mA)
100
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
EFFICIENCY (%)
V
bat
(V)
6
.5
V
out
=7.5 V
I
led
= 40 mA
V
out
= 15 V
I
led
= 20 mA
100
0 10203040506070
EFFICIENCY (%)
I
LED
(mA)
I
peak
(mA)
V
bat
= 6.0 V
3.0 V
3.6 V
4.2 V
5.0 V
Bn
7
4
3
2
1
6
5
V
bat
= 3.6 V
V
bat
= 4.2 V
V
bat
= 3.0 V
V
bat
= 3.6 V
V
bat
= 4.2 V
V
bat
= 3.0 V
90
80
70
60
50
95
90
85
80
75
TYPICAL OPERATING CHARACTERISTICS
Condition: Typical Application: L = 22 mH, Cin = 10 mF, Cout = 2.2 mF, R1 = 30 kW

NCP5008DMR2

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
IC LED DRIVER RGLTR 75MA 10MICRO
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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