MAX14521E Datasheet, PDF (2/20 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

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.maxim-ic.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
Shutdown Tapped-Inductor
Supply Current
Undervoltage Lockout
UVLO Hysteresis
EL OUTPUTS (EL_, COM)
Peak-to-Peak Output Voltage
Max Average Output Voltage
EL_ High-Side Switch
On-Resistance
EL_ Low-Side Switch
On-Resistance
COM High-Side Switch
On-Resistance
COM Low-Side Switch
On-Resistance
SYMBOL
CONDITIONS
MIN
V_DD
2.7
V_BAT (Note 3)
I_DD
All channels on, 300V_P-P, f_EL = 200Hz, sine-
wave output shape
I_SHDN
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
I_{LX_SHDN}
V_UV
V_DD rising
1.6
V_{UV_HYST}
TYP MAX UNITS
5.5
V
13.2
V
350
900
µA
25
100
nA
300
2100
nA
2.0
2.5
V
70
mV
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
V_AVG V_{EL_} - V_COM
1
V
R_{ONHS_EL_}
1270
Ω
R_{ONLS_EL_}
700
Ω
R_{ONHS_COM}
390
Ω
R_{ONLS_COM}
175
Ω
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