MAX6977 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX6977 Datasheet PDF : 13 Pages
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8-Port, 5.5V Constant-Current LED Driver with
LED Fault Detection
ABSOLUTE MAXIMUM RATINGS
Voltage (with respect to GND)
V+ ............................................................................-0.3V to +6V
OUT_ .......................................................................-0.3V to +6V
DIN, CLK, LE, OE, SET ................................-0.3V to (V+ + 0.3V)
DOUT Current ..................................................................±10mA
OUT_ Sink Current .............................................................60mA
Total GND Current ...........................................................480mA
Continuous Power Dissipation (TA = +70°C)
16-Pin SSOP (derate 7.1mW/°C above +70°C) ............571mW
16-Pin PDIP (derate 10.5mW/°C above +70°C)............842mW
16-Pin TSSOP (derate 21.3mW/°C above +70°C) ......1702mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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
(Typical Operating Circuit, V+ = 3V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = 5V, TA = +25°C.)
(Note 1)
PARAMETER
Operating Supply Voltage
Output Voltage
Standby Current
(Interface Idle, All Output Ports
High Impedance, RSET = 360Ω)
Standby Current
(Interface Running, All Output
Ports High Impedance,
RSET = 360Ω)
Supply Current
(Interface Idle, All Output Ports
Active Low, RSET = 360Ω)
Input High Voltage
DIN, CLK, LE, OE
SYMBOL
V+
VOUT
CONDITIONS
All logic inputs at V+ or GND, DOUT
I+
unloaded
I+
fCLK = 5MHz, OE = V+, DIN and LE = V+
or GND, DOUT unloaded
I+
All logic inputs at V+ or GND,
DOUT unloaded
VIH
MIN TYP
3
4.5
4.7
10
0.7 V+
MAX
5.5
5.5
UNITS
V
V
5.6
mA
6
mA
25
mA
V
Input Low Voltage
DIN, CLK, LE, OE
VIL
0.3 V+
V
Hysteresis Voltage
DIN, CLK, LE, OE
∆VI
0.8
V
Input Leakage Current
DIN, CLK, LE, OE
IIH, IIL
-1
+1
µA
Output High-Voltage DOUT
Output Low Voltage
Output Current OUT_
Output Leakage Current OUT_
Watchdog Timeout
VOH
ISOURCE = 4mA
V+
- 0.5V
V
VOL
ISINK = 4mA
0.5
V
IOUT
ILEAK
tWD
V+ = 4.5V to 5.5V, VOUT = 0.8V to 2.5V,
RSET = 360Ω
OE = V+, VOUT = V+
42
50
56
mA
1
µA
1
s
2 _______________________________________________________________________________________
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