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LTC3207 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3207
Description  600mA Universal Multi-Output LED/CAM Driver
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3207 Datasheet(HTML) 6 Page - Linear Technology

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LTC3207/LTC3207-1
6
3207fc
CAM PIN CURRENT (mA)
50
500
3207 G16
400
200
300
100
0
150
100
250
200
350
400
300
VBAT = 3.6V
ULED PIN VOLTAGE (V)
0
10
20
30
5
15
25
0.06
0.12
0.18
0.24
3207 G17
0.30
0.00
VBAT = 3.6V
INPUT CODE (HEX)
0
16
20
28
1C
2E
3207 G18
12
8
0A
113
25
37
3F
4
0
24
CAM Pin Dropout Voltage
vs CAM Pin Current
ULED Pin Current
vs ULED Pin Voltage
ULED Current vs Input Code
ULED PIN CURRENT (mA)
0
0
20
60
80
100
14 16
20
18
22
180
3207 G19
40
24
8
610 12
28
26
24
120
140
160
VBAT = 3.6V
VBAT VOLTAGE (V)
3.0
60
80
100
5.0
3207 G20
40
20
50
70
90
30
10
0
3.5
4.0
4.5
5.5
300mA LED CURRENT
(TYP VF AT 300mA = 3.6V,
AOT-2015HPW)
VBAT VOLTAGE (V)
3.0
60
80
100
5.0
3207 G21
40
20
50
70
90
30
10
0
3.5
4.0
4.5
5.5
12 LEDS AT 15mA/LED
(TYP VF AT 15mA = 3.2V,
NICHIA NSCW100)
TYPICAL PERFORMANCE CHARACTERISTICS
ULED Pin Dropout Voltage
vs ULED Pin Current
CAM Efficiency vs VBAT Voltage
12-LED ULED Display Efficiency
vs VBAT Voltage
PIN FUNCTIONS
CPO (Pin 1): Output of the Charge Pump. Used to power
all LEDs. A 4.7µF X5R or X7R ceramic capacitor should
be connected to ground.
ULED1-ULED12 (Pins 2-6,12-18): Current Source Outputs
for Driving LEDs. The LED current can be set from 0mA
to 27.5mA in 64 steps via software control and internal
6-bit linear DAC. Each output can be disabled by setting
the associated data register REG1 to REG12 low. ULED1
to ULED12 can also be used as I2C controlled open-drain
general purpose outputs. Connect unused outputs to
ground.
CAM (Pin 7): Current Source Output for the CAM Display
White LED. The LED on the CAM display can be set from
0mA to 425mA in 16 steps via software control and in-
ternal 4-bit linear DAC. Two 4-bit registers are available.
One is used to program the high camera current and the
second the low camera current. These registers can be
selected via the serial port or the CAMHL pin. The output
can be disabled by setting data in REG13 low. A safety
timer will disable the output after two seconds whenever
the high camera current mode is selected (see Applica-
tions Information).
TA = 25°C unless otherwise noted



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