MAX14521E_15 Datasheet, PDF (2/21 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

MAX14521E
Quad, High-Voltage EL Lamp Driver
with I²C Interface
Absolute Maximum Ratings
(All voltages referenced to GND, unless otherwise noted.)
V_DD........................................................................-0.3V to +6.0V
CS, EL1, EL2, EL3, EL4, COM............................-0.3V to +160V
LX...........................................................................-0.3V to +33V
RB, A0, A1, AUX....................................................-0.3V to +6.0V
SCL, SDA.................................................. -0.3V to (V_DD + 0.3V)
Continuous Power Dissipation (T_A = +70°C)
24-Pin TQFN-EP (derate 27.8mW/°C above +70°C).....2222mW
Package Junction-to-Ambient Thermal Resistance (θ_JA)
(Note 1) .......................................................................36°C/W
Package Junction-to-Case Thermal Resistance (θ_JC)
(Note 1)...........................................................................3°C/W
Operating Temperature Range............................ -40°C to +85°C
Storage Temperature Range............................. -65°C to +150°C
Junction Temperature.......................................................+150°C
Lead Temperature (soldering, 10s).................................. +300°C
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(V_DD = +2.7V to +5.5V, total C_LAMP = 10nF, C_CS = 3.3nF, tapped inductor = 2.3μH/115μH, 1:7 ratio (I_SAT = 0.7A, R_S = 1Ω), T_A = -40°C
to +85°C, unless otherwise noted. Typical values are at T_A = +25°C and V_DD = 3.7V.) (Note 2)
PARAMETER
Input Voltage
Battery Voltage
Input Supply Current
Shutdown Supply Current
SYMBOL
V_DD
V_BAT
I_DD
I_SHDN
CONDITIONS
(Note 3)
All channels on, 300V_P-P, f_EL = 200Hz,
sinewave output shape
RB, A0, A1 = 0V or V_DD;
SCL = SDA = GND or
V_DD; not toggling
T_A = +25°C
T_A = -40°C
to +85°C
MIN TYP MAX UNITS
2.7
5.5
V
13.2
V
350
900
µA
25
100
nA
300
Shutdown Tapped-Inductor
Supply Current
I_{LX_SHDN}
2100
nA
Undervoltage Lockout
V_UV
V_DD rising
1.6
2.0
2.5
V
UVLO Hysteresis
V_{UV_HYST}
70
mV
EL OUTPUTS (EL_, COM)
Peak-to-Peak Output Voltage
V_{EL_} -V_COM ; EL_ _[4:0] = 01000; V_DD = 3.7V 66
78
90
V_P-P
V_{EL_} -V_COM ; EL_ _[4:0] = 10000; V_DD = 3.7V 136
154
172
V
V_{EL_} -V_COM ; EL_ _[4:0] = 11111; V_DD = 3.7V 268
300
320
Max Average Output Voltage
EL_ High-Side Switch
On-Resistance
V_AVG
V_{EL_} - V_COM
R_{ONHS_EL_}
1
V
1270
Ω
EL_ Low-Side Switch
On-Resistance
R _{ONLS_EL_}
700
Ω
COM High-Side Switch
On-Resistance
R_{ONHS_COM}
390
Ω
COM Low-Side Switch
On-Resistance
R_{ONHS_COM}
175
Ω
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