ISL97678 Просмотр технического описания (PDF) - Intersil
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ISL97678 Datasheet PDF : 18 Pages
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ISL97678
Absolute Maximum Ratings
Voltage ratings are all with respect to AGND pin
VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 27V
EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 27V
VLOGIC . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.75V
VDC, PWM . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.75V
COMP, RSET, FPWM, FSW . . . . . . . . . . . . . . . . -0.3V to min
. . . . . . . . . . . . . . . . . . . . . . . . . . . . (VDC + 0.3V, 5.75V)
CH1 - CH8, LX, OVP . . . . . . . . . . . . . . . . . . . . -0.3V to 45V
PGND, AGND . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
Recommended Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . -40°C to +85°C
Thermal Information
Thermal Resistance (Typical)
θJA (°C/W) θJC (°C/W)
32 Ld QFN (Notes 4, 5) . . . . . . . . . 31
3
Thermal Characterization (Typical, Note 6)
PSIJT (°C/W)
32 Ld QFN . . . . . . . . . . . . . . . . . . . . . . . . . 0.2
Maximum Continuous Junction Temperature . . . . . . +125°C
Storage Temperature . . . . . . . . . . . . . . . -65°C to +150°C
Power Dissipation
TA < +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2W
TA < +70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8W
TA < +85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3W
TA < +100°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8W
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
NOTES:
4. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief
TB379 for details.
5. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
6. PSIJT is the PSI junction-to-top thermal characterization parameter. If the package top temperature can be measured with
this rating then the die junction temperature can be estimated more accurately than the θJC and θJC thermal resistance
ratings.
5E. lectrical Specifications
All specifications below are characterized at TA = -40°C to +85°C; VIN = 12V, /SHUT = 5V,
ISET = 36kΩ, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +85°C.
PARAMETER
DESCRIPTION
CONDITION
MIN
MAX
(Note 7) TYP (Note 7) UNIT
GENERAL
VIN
Backlight Supply Voltage
4.75
26
V
(Note 8)
IVIN_SHDN
VIN Shutdown Current
VOUT
Output Voltage
VUVLO
Undervoltage Lockout Threshold
VUVLO_HYS
Undervoltage Lockout Hysteresis
LINEAR REGULATOR
/SHUT = 0
5
µA
45
V
2.9
3.3
V
300
mV
VDC
5V Analog Bias Regulator
VDC_DROP
VDC LDO Dropout Voltage
IVDC
Active Current
VLOGIC
2.5V Logic Bias Regulator
VLOGIC_DROP
VLOGIC LDO Dropout Voltage
BOOST SWITCHING REGULATOR
VIN > 6V
4.8
5
5.1
V
IVDC = 30mA
71
100
mV
/SHUT = 5V, R = 33kΩ
10
mA
VIN > 6V
IVLOGIC = 30mA
2.3
2.4
2.5
V
31
100
mV
SS
Soft-Start
16
ms
SWILimit
rDS(ON)
Boost FET Current Limit
Internal Boost Switch ON-Resistance
TA = +25°C to +85°C
3.0
4.7
A
130
mΩ
5
FN6998.1
November 5, 2009
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