Rainbow-electronics MAX8759 Manual de usuario Pagina 2
- Pagina / 31
- Tabla de contenidos
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
MAX8759
Low-Cost, SMBus, CCFL Backlight Controller
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
BATT
= 12V, V
CC
= V
DD,
T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.)
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.
BATT to GND..........................................................-0.3V to +30V
BST1, BST2 to GND ...............................................-0.3V to +36V
BST1 to LX1, BST2 to LX2 ........................................-0.3V to +6V
FREQ, V
CC
, V
DD
to GND .........................................-0.3V to +6V
SDA, SCL to GND.....................................................-0.3V to +6V
ALS, COMP, PWMI, PWMO,
TFLT, DEL, VALS to GND.......................-0.3V to (V
CC
+ 0.3V)
GH1 to LX1 ..............................................-0.3V to (V
BST1
+ 0.3V)
GH2 to LX2 ..............................................-0.3V to (V
BST2
+ 0.3V)
GL1, GL2 to GND.......................................-0.3V to (V
DD
+ 0.3V)
IFB1, IFB2, ISEC, VFB to GND ....................................-3V to +6V
PGND1, PGND2 to GND .......................................-0.3V to +0.3V
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Thin QFN 5mm x 5mm
(derate 21.3mW/°C above +70°C).............................1702mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
= V
DD
= V
BATT
4.5 5.5
BATT Input Voltage Range
V
CC
= V
DD
= open 5.5
28.0
V
V
BATT
= 28V 2.5 5
BATT Quiescent Current
MAX8759 is enabled
V
BATT
= V
CC
= 5V 5
mA
BATT Quiescent Current, Shutdown MAX8759 is disabled 0.1 2 µA
V
CC
Output Voltage, Normal Operation
MAX8759 is enabled, 6V < V
BATT
< 28V,
0 < I
LOAD
< 10mA
5.2
5.35
5.5 V
V
CC
Output Voltage, Shutdown MAX8759 is disabled, no load 3.5 4.3 5.5 V
V
CC
rising (leaving lockout) 4.3
V
CC
Undervoltage Lockout Threshold
V
CC
falling (entering lockout) 3.7
V
V
CC
Undervoltage Lockout Hysteresis 230 mV
V
CC
POR Threshold Rising edge
1.75
V
V
CC
POR Hysteresis 50 mV
GH1, GH2, GL1, GL2 On-Resistance,
Low State
I
TEST
= 100mA, V
CC
= V
DD
= 5V 3 6 Ω
GH1, GH2, GL1, GL2 On-Resistance,
High State
I
TEST
= 100mA, V
CC
= V
DD
= 5V 10 18 Ω
BST1, BST2 Leakage Current V
BST
_ = 12V, V
LX
_ = 7V 4 10 µA
Resonant Frequency Range Guaranteed by design 30 80 kHz
Minimum On-Time 350 500 700 ns
Maximum Off-Time 40 60 80 µs
Current-Limit Threshold LX1 - PGND1, LX2 - PGND2 415 430 445 mV
Zero-Current-Crossing Threshold LX1 - PGND1, LX2 - PGND2 3 8 13 mV
Current-Limit Leading-Edge Blanking 350 ns
IFB1, IFB2 Input-Voltage Range -3 +3 V
IFB1 Regulation Point 765 785 805 mV
IFB2 Regulation Point 780 800 820 mV
- General Description 1
- Applications 1
- Features 1
- Ordering Information 1
- Minimal Operating Circuit 1
- ABSOLUTE MAXIMUM RATINGS 2
- ELECTRICAL CHARACTERISTICS 2
- Pin Description 10
- Pin Description (continued) 11
- Typical Operating Circuit 13
- Detailed Description 13
- Lamp-Current Regulation 16
- Feed-Forward Control 17
- Lamp Startup 17
- Dimming Control 18
- SMBus with DPST Mode 18
- Fault Protections 19
- Linear Regulator Output (V 19
- POR and UVLO 19
- Low-Power Shutdown 20
- SMBus Interface (SDA, SCL) 20
- SMBus Register Definitions 21
- Table 3. Commands Description 22
- Control Register Bits 5, 4 24
- Applications Information 26
- Component Selection 27
- COMP Capacitor Selection 28
- Setting the Fault-Delay Time 28
- Bootstrap Capacitors 28
- Dual-Lamp Operating Circuit 28
- Layout Guidelines 28
- Chip Information 30
- Pin Configuration 30
- Package Information 31
Relacionado con productos y manuales para Panel De Control Rainbow-electronics MAX8759
(13 paginas)© 2020, manymanuals.es. Todos los derechos reservados | 0.080 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales