MAX14521E_15 Datasheet, PDF (12/21 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

MAX14521E
Quad, High-Voltage EL Lamp Driver
with I²C Interface
Slave Address
The MAX14521E device address is set through external
inputs. The slave address consists of five fixed bits (B7–
B3, set to 11110) followed by two input programmable bits
(A1 and A0).
For example: If A1 and A0 are hardwired to ground, then
the complete address is 1111000. The full address is
defined as the seven most significant bits followed by the
read/write bit. Set the read/write bit to 1 to configure the
MAX14521E to read mode. Set the read/write bit to 0 to
configure the MAX14521E to write mode. The address is
the first byte of information sent to theMAX14521E after
the START condition.
System Registers (0x00, 0x01)
Device ID (DEVID3/DEVID2/DEVID1/DEVID0)
DEVID[3:0] is preprogrammed to 1011 to identify the
MAX14521E; see Table 2.
Revision (REV3/REV2/REV1/REV0)
REV[3:0] is preprogrammed to the current revision of the
MAX14521E and is REV[3:0] = 0010.
System Overtemperature (OVRTEMP)
1 = Thermal shutdown temperature exceeded.
0 = Analog circuitry operating properly.
OVRTEMP = 1 turns the EL outputs off. To set OVRTEMP
to 0 and restart in default condition (all register reset), the
user must place RB = 0.
System Enable (EN)
1 = EL outputs enabled.
0 = EL outputs disabled.
EN = 1 places the MAX14521E in a normal operating
mode. Register contents are restored to values prior to
shutdown. EN = 0 disables the EL outputs and places the
device in a low-power shutdown state.
EL Frequency Register (0x02)
EL Frequency (FEL[7:0])
FEL[7:6] sets the EL frequency range of all EL outputs
and FEL[5:0] sets the EL frequency within the frequency
range; see Table 4. FEL[5:0] = 000000 sets the frequency
to the minimum value of the frequency range. FEL[5:0] =
111111 sets the frequency to the maximum value of the
frequency range. EL frequency increases linearly with
FEL[5:0]; see Table 3.
Table 2. Device Identification, Status, and Enable
REGISTER
0x00
0x01
B7
DEVID3
OVRTEMP*
B6
DEVID2
X
B5
DEVID1
X
B4
DEVID0
X
X = Don’t Care
B3
REV3
X
Table 3. EL Output Frequency
REGISTER
0x02
B7
FEL7
B6
FEL6
B5
FEL5
B4
FEL4
B3
FEL3
Table 4. EL Frequency Range
FEL[7:6]
00
01
10
11
EL FREQUENCY RANGE (HZ)
50–100
100–200
200–400
400–800
B2
REV2
X
B2
FEL2
B1
REV1
X
B1
FEL1
B0
REV0
EN
B0
FEL0
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