ADP1653ACPZ-R7 Analog Devices Inc, ADP1653ACPZ-R7 Datasheet - Page 14

• Manufacturer Part Number: ADP1653ACPZ-R7
• Description: IC,Laser Diode/LED Driver,LLCC,16PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Type: Photo Flash LEDr

Specifications of ADP1653ACPZ-R7

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Flash/Torch
• Frequency: 1.2MHz
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-LFCSP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 200mA, 500mA
• Internal Switch(s): Yes
• Efficiency: 92%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ADP1653ACPZ-R7TR

ADP1653
2-BIT LOGIC INTERFACE MODE (INTF = 1)
In 2-bit logic interface mode, the two control pins, CTRL1 and
CTRL0, select whether the part is disabled or operating in indicator
LED mode, torch mode, or flash mode, as outlined in Table 7.
Table 7. 2-Bit Logic Interface Mode Selection
INTF = 1
Disabled
ILED
Torch
Flash
The LED current levels for indicator LED mode, torch mode,
and flash mode operation are set with separate external resistors
tied between ground and the SETI, SETT, and SETF pins,
respectively. The resulting reference current into each SETx pin
is equal to 1.22 V/R
fixed ratio sets the relevant LED current.
Table 8. Reference Current to LED Current Scaling
INTF = 1
Disabled
ILED
Torch
Flash
Alternatively, a default internal current setting is used by tying
the SETx pin high. The default current for each mode of operation
approximately equals the current obtained with a 50 kΩ resistor
tied from the SETx pin to ground.
ST 0
CTRL1
0
0
1
1
CTRL1
0
0
1
1
1
CHIP ADDRESS
1
SETx
CTRL0
0
1
0
1
0
. The reference current multiplied by a
ST 0
0
CTRL0
0
1
0
1
0
LED Current
Setting Pin
—
SETI
SETT
SETF
0 = WRITE
1
0
CHIP ADDRESS
0
1
0
0
LED Current
—
I
I
I
REF
REF
REF
0
0
(SETI) × 400
(SETT) × 5200
(SETF) × 20,800
0
0
0 = WRITE
SUBADDRESS
0
0
Default Current
(SETx = H)
—
ILED = 10 mA
HPLED = 125 mA
HPLED = 500 mA
0
0
0
0
0
Figure 26. I
Figure 27. I
1
Rev. B | Page 14 of 24
SUBADDRESS
1
0 ST 0
2
2
C Write Sequence
C Read Sequence
Consequently, the LED current resulting from an external
resistor R
where I
pin high.
The values of I
(SETI), torch mode (SETT), and flash mode (SETF) operation.
For accurate LED current settings, the minimum SETx resistor
values should be 25 kΩ (SETI, SETT) or 50 kΩ (SETF).
The flash current can be quickly reduced with an external
logic signal (typically 1.8 V logic) by adding a second external
resistor from the SETF pin to the logic signal. Bringing this
digital input from low to high toggles the flash from normal
to reduced current mode by reducing the reference current
supplied to the ADP1653 via the SETF pin (see the Applications
Information section).
I
The ADP1653 includes an I
control of LED current, as well as for readback of system status
registers. The I
write mode). The default value of all four registers is 0x00.
Registers values are reset to the default values when enable is
brought low, or the VDD supply falls below the undervoltage
(UVLO) level.
Figure 26 illustrates the I
content selects which of the four ADP1653 registers is written
to. Figure 27 shows the I
the data from the register denoted by the subaddress. In this
case, the fault register is read (REG3).
The register definitions are shown in Figure 28. The lowest bit
number (0) represents the least significant bit, and the highest
bit number (7) represents the most significant bit.
2
1
C INTERFACE MODE (INTF = 0)
CHIP ADDRESS
1
I
LED
0
0
DEFAULT
SETx
=
0
ADP1653 RECEIVES DATA
I
is given by the following equation:
DEFAULT
0
is the LED current resulting from tying the SETx
DEFAULT
2
C chip address is 0x60 (0110 0000 (binary) in
1 = READ
0
1
are given in Table 7 for indicator LED mode
×
0
50
R
2
SETx
2
C read sequence. The ADP1653 sends
kΩ
C write sequence. The subaddress
2
ADP1653 SENDS DATA
C-compatible serial interface for
0 SP
1 SP
(1)