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
(Circuit of Figure 1. V
BATT
= 12V, V
LOT
= V
REF
, V
CC
= V
DD
, V
SUS
= 5.3V,
T
A
= 0°C to +85°C.
Typical values are at T
A
= +25°C,
unless otherwise noted.)
PARAMETER
V
BATT
Input Voltage Range
V
BATT
Quiescent Current
V
BATT
Quiescent Current, Shutdown
V
CC
Output Voltage, Normal Operation
V
CC
Output Voltage, Shutdown
V
CC
Undervoltage-Lockout Threshold
V
CC
Undervoltage-Lockout Hysteresis
V
CC
Power-On Reset (POR) Threshold
V
CC
POR Hysteresis
REF Output Voltage, Normal Operation
GH1, GH2, GL1, GL2 On-Resistance
GH1, GH2, GL1, GL2 Output Current
BST1, BST2 Leakage Current
Input Resonant Frequency
Minimum Off-Time
Maximum Off-Time
Current-Limit Threshold
LX1 - GND, LX2 - GND (Fixed)
Current-Limit Threshold
LX1 - GND, LX2 - GND (Adjustable)
Minimum Current Threshold
LX1 - GND, LX2 - GND
ILIM = V
CC
V
ILIM
= 0.5V
V
ILIM
= 2.0V
V
BST
_ = 12V, V
LX
_ = 7V
Guaranteed by design
25
180
18
180
80
370
280
28
200
100
400
6
4.5V < V
CC
< 5.5V, I
LOAD
= 40µA
I
TEST
= 100mA, V
CC
= V
DD
= 5.3V
1.96
Rising edge
0.90
CONDITIONS
V
CC
= V
DD
= V
BATT
V
CC
= V
DD
= open
V
SUS
= 5.5V
SUS = GND
V
SUS
= 5.5V, 6V < V
BATT
< 28V,
0 < I
LOAD
< 20mA
SUS = GND, no load
V
CC
rising (leaving lockout)
V
CC
falling (entering lockout)
4.0
200
1.75
50
2.00
9
0.5
5
300
380
38
220
120
430
2.04
18
2.70
5.0
3.5
V
BATT
= 28V
V
BATT
= V
CC
= 5V
6
5.35
4.6
MIN
4.6
5.5
1.5
TYP
MAX
5.5
28.0
3
3
20
5.5
5.5
4.5
UNITS
V
mA
µA
V
V
V
mV
V
mV
V
Ω
A
µA
kHz
ns
µs
mV
mV
mV
www.maximintegrated.com
Maxim Integrated
│
2
MAX8709B
High-Efficiency CCFL Backlight
Controller with SMBus Interface
Electrical Characteristics (continued)
(Circuit of Figure 1. V
BATT
= 12V, V
LOT
= V
REF
, V
CC
= V
DD
, V
SUS
= 5.3V,
T
A
= 0°C to +85°C.
Typical values are at T
A
= +25°C,
unless otherwise noted.)
PARAMETER
LOT Input Voltage Range
LOT Input Bias Current
IFB Input Voltage Range
IFB Regulation Point
IFB Input Bias Current
IFB Lamp-Out Threshold
IFB to CCI Transconductance
CCI Output Impedance
ISEC Input Voltage Range
ISEC Regulation Threshold
ISEC Input Bias Current
VFB Input Voltage Range
VFB Input Bias Current
VFB Regulation Point
VFB to CCV Transconductance
VFB Zero-Voltage Crossing Threshold
CCV Output Impedance
DPWM Chopping Frequency
Lamp-Out Detection Timeout Timer
SDA, SCL, SUS Input Low Voltage
SDA, SCL, SUS Input High Voltage
SDA, SCL, SUS Input Hysteresis
SDA, SCL, SUS Input Bias Current
SDA Output Low Sink Current
SCL Serial Clock High Period
SCL Serial Clock Low Period
START Condition Setup Time
START Condition Hold Time
SDA Valid to SCL Rising-Edge Setup Time,
Slave Clocking-In Data
SCL Falling Edge to SDA Transition
SCL Falling Edge to SDA Valid,
Reading Out Data
V
SDA
= 0.4V
T
HIGH
T
LOW
t
SU:STA
t
HD:STA
t
SU:DAT
t
HD:DAT
t
DV
-1
4
4
4.7
4.7
4
250
0
700
2.1
300
+1
V
IFB
< 0.1V (Note 1)
204
1.14
1V < V
CCV
< 2.7V
-10
20
210
1.22
216
1.30
0.8
V
VFB
= 0.5V
V
ISEC
= 1.25V
-2
1.20
-2
-2
-0.5
490
510
40
+10
1.25
V
IFB
= 0.4V
LOT = REF
1V < V
CCI
< 2.5V
CONDITIONS
MIN
0.5
-2
-1.7
380
-2
500
600
100
20
+2
1.30
+2
+2
+0.5
530
400
TYP
MAX
V
REF
+2
+1.7
420
+2
700
UNITS
V
µA
V
mV
µA
mV
µS
MΩ
V
V
µA
V
µA
mV
µS
mV
MΩ
Hz
s
V
V
mV
µA
mA
µs
µs
µs
µs
ns
ns
ns
www.maximintegrated.com
Maxim Integrated
│
3
MAX8709B
High-Efficiency CCFL Backlight
Controller with SMBus Interface
Electrical Characteristics
(Circuit of Figure 1. V
BATT
= 12V, V
LOT
= V
REF
, V
CC
= V
DD
, V
SUS
= 5.3V,
T
A
= -40°C to +85°C.
Typical values are at T
A
= +25°C,
unless otherwise noted.) (Note 2)
PARAMETER
V
BATT
Input Voltage Range
V
BATT
Quiescent Current
V
BATT
Quiescent Current, Shutdown
V
CC
Output Voltage, Normal Operation
V
CC
Output Voltage, Shutdown
V
CC
Undervoltage-Lockout Threshold
V
CC
Power-On Reset (POR) Threshold
REF Output Voltage, Normal Operation
GH1, GH2, GL1, GL2 On-Resistance
BST1, BST2 Leakage Current
Input Resonant Frequency
Minimum Off-Time
Maximum Off-Time
Current-Limit Threshold
LX1 - GND, LX2 - GND (Fixed)
Current-Limit Threshold
LX1 - GND, LX2 - GND (Adjustable)
Current-Limit Leading-Edge Blanking
LOT Input Voltage Range
LOT Input Bias Current
IFB Input Voltage Range
IFB Regulation Point
IFB Input Bias Current
IFB Lamp-Out Threshold
ISEC Input Voltage Range
ISEC Regulation Point
ISEC Input Bias Current
VFB Input Voltage Range
VFB Input Bias Current
VFB Regulation Point
VFB Zero-Voltage Crossing Threshold
DPWM Chopping Frequency
V
VFB
= 0.5V
V
ISEC
= 1.25V
V
IFB
= 0.4V
LOT = REF
ILIM = V
CC
V
ILIM
= 0.5V
V
ILIM
= 2.0V
CONDITIONS
V
CC
= V
DD
= V
BATT
V
CC
= V
DD
= open
V
SUS
= 5.5V
SUS = GND
V
SUS
= 5.5V, 6V < V
BATT
< 28V,
0 < I
LOAD
< 20mA
SUS = GND, no load
V
CC
rising (leaving lockout)
V
CC
falling (entering lockout)
Rising edge
4.5V < V
CC
< 5.5V, I
LOAD
= 40µA
I
TEST
= 100mA, V
CC
= V
DD
= 5.3V
V
BST
_ = 12V, V
LX
_ = 7V
Guaranteed by design
25
180
18
180
80
370
250
0.5
-2
-1.7
380
-2
500
-2
1.20
-2
-2
-0.5
490
-10
204
4.0
0.90
1.95
2.70
2.05
18
5
300
380
38
220
120
430
450
V
REF
+2
+1.7
420
+2
700
+2
1.30
+2
+2
+0.5
530
+10
216
5.0
3.5
V
BATT
= 28V
V
BATT
= V
CC
= 5V
MIN
4.6
5.5
TYP
MAX
5.5
28.0
3
3
20
5.5
5.5
4.5
UNITS
V
mA
µA
V
V
V
V
V
Ω
µA
kHz
ns
µs
mV
mV
ns
V
µA
V
mV
µA
mV
V
V
µA
V
µA
mV
mV
Hz
www.maximintegrated.com
Maxim Integrated
│
4
MAX8709B
High-Efficiency CCFL Backlight
Controller with SMBus Interface
Electrical Characteristics (continued)
(Circuit of Figure 1. V
BATT
= 12V, V
LOT
= V
REF
, V
CC
= V
DD
, V
SUS
= 5.3V,
T
A
= -40°C to +85°C.
Typical values are at T
A
= +25°C,
unless otherwise noted.) (Note 2)
PARAMETER
Lamp-Out Detection Timeout Timer
SDA, SCL, SUS Input Low Voltage
SDA, SCL, SUS Input High Voltage
SDA, SCL, SUS Input Bias Current
SDA Output Low Sink Current
SCL Serial Clock High Period
SCL Serial Clock Low Period
START Condition Setup Time
START Condition Hold Time
SDA Valid to SCL Rising-Edge Setup Time,
Slave Clocking-In Data
SCL Falling Edge to SDA Transition
V
SDA
= 0.4V
T
HIGH
T
LOW
t
SU:STA
t
HD:STA
t
SU:DAT
t
HD:DAT
2.1
-1
4
4
4.7
4.7
4
250
0
+1
CONDITIONS
V
IFB
< 0.1V (Note 1)
MIN
1.14
TYP
MAX
1.30
0.8
UNITS
s
V
V
µA
mA
µs
µs
µs
µs
ns
ns
Note 1:
Corresponds to 256 DPWM cycles.
Note 2:
Specifications to -40°C are guaranteed by design based on final characterization results.
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