MAX16805_07 Datasheet, PDF (5/19 Pages) Maxim Integrated Products – EEPROM-Programmable, High-Voltage, 350mA LED Drivers with LED Current Foldback

EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = V_EN = 12V, C_V5 = 0.1µF, I_V5 = 0, CS- = GND, R_SENSE = 0.56Ω, V_DIM = 4V, DGND = GND, TFP/SCL = 5V, TFN/SDA = 0V,
SW = CFD = Open, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
EEPROM
V_IN Voltage for EEPROM
Programming
20
22
24
V
EEPROM Data-Retention Time
I²C DIGITAL INPUTS (TFP/SCL, TFN/SDA) (Note 5)
Logic Input-Voltage High
V_IH
Logic Input-Voltage Low
V_IL
Input Capacitance
SDA Output Voltage Low
V_OL
I²C INTERFACE TIMING (Figure 1)
I_SINK = 3mA
Serial Clock Frequency
f_SCL
Bus Free Time Between STOP
and START Condition
t_BUF
10
Years
2.8
V
0.8
V
5
pF
0.4
V
400
kHz
1.3
µs
START Condition Hold Time
Clock Low Period
Clock High Period
Repeat START Condition Setup
Time
Data Hold Time
t_HD:STA
0.6
t_LOW
1.3
t_HIGH
0.6
t_SU:STA
0.6
A master device must provide a hold time
of at least 300ns for the SDA signal
t_HD:DAT ^{(referred to V}IL ^{of the SCL signal) in order}
0
to bridge the undefined region of SCL’s
falling edge
µs
µs
µs
µs
0.9
µs
Data Setup Time
Receive SCL/SDA Rise Time
Receive SCL/SDA Fall Time
STOP Condition Setup Time
Pulse Width of Spike Suppressed
Transmit SDA Fall Time
t_SU:DAT
t_R
t_F
t_SU:STO
t_SP
I_SINK < 6mA, C_B ≤ 400pF (Note 6)
100
ns
300
ns
250
ns
0.6
µs
50
ns
250
ns
Note 1: All devices 100% production tested at T_J = +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Resistors were added from OUT to CS+ to aid with the power dissipation during testing.
Note 3: Dropout is measured as follows: Connect a resistor from OUT to CS+. Connect R_SENSE = 0.56Ω from CS+ to CS-. Set V_IN =
V_OUT +3V (record V_OUT as V_OUT1). Reduce V_IN until V_OUT = 0.97 x V_OUT1 (record as V_IN2 and V_OUT2). ΔV_DO = V_IN2 - V_OUT2.
Note 4: t_ON time includes the delay and the rise time needed for I_OUT to reach 90% of its final value. t_OFF time is the time needed for
I_OUT to drop below 10%. See the Typical Operating Characteristics. t_ON and t_OFF are tested with 13Ω from OUT to CS+.
Note 5: TPF/SCL (SCL for MAX16805) and TPN/SDA (SDA for the MAX16805) are I²C interface compatible only when the
MAX16805/MAX16806 are the only parts on the bus for production programming.
Note 6: C_B is the total bus capacitance.
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