HT7466 查看數據表（PDF） - Holtek Semiconductor
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HT7466 Datasheet PDF : 9 Pages
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HT7466
Absolute Maximum Ratings
Maximum Input Supply Voltage.............................26V
Switch Node Voltage..............................................26V
Feedback Voltage......................................................6V
EN Voltage................................................................6V
Comp Voltage...........................................................6V
SS Voltage.................................................................6V
Maximum Junction Temperature........................ 150°C
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings”
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
Recommended Operating Conditions
Input Supply Voltage................................4.75V ~ 24V
Ambient Temperature Range................ -40°C ~ +85°C
Electrical Characteristics
VIN=12V, Ta=25°C, unless otherwise specified refer to circuit of Figure 1. ( note 1)
Symbol
Parameter
Test Condition Min. Typ. Max. Unit
VFB
VUVLO
Feedback Voltage
Under Voltage Lockout Threshold
4.75V ≤ VIN ≤ 24V 1.194 1.222 1.250
V
—
—
4.1
—
V
—
Under Voltage Lockout Threshold Hysteresis
—
—
200
—
mV
IQ
ISS
FOSC
—
DMAX
ISW
RDS
Quiescent Current
Shutdown Supply Current
Oscillator Frequency
Short Circuit Frequency
Maximum Duty Cycle
Upper Switch Leakage
Switch On Resistance (note 2)
VFB=1.5V, VEN=High
—
1.0
1.2
mA
VEN=0V
—
—
20
30
mA
—
380
—
kHz
VFB=0V
VFB=1.0V
VEN=0V, VSW=0V
IOUT=3A
20
35
50
kHz
—
90
—
%
—
0
10
mA
—
95
—
mW
ILIMIT
Current Limit
—
—
4.3
—
A
—
Error Amplifier Voltage Gain (note 2)
—
—
70
—
dB
—
Error Amplifier Trans-conductance (note 2)
—
—
800
—
mA/V
VEN
Enable Threshold
TJ
Thermal Shutdown
4.75V ≤ VIN ≤ 24V
0.9
1.0
1.5
V
—
—
150
—
°C
Note: 1. Specifications are production tested at Ta=room temperature. Specifications over the -40°C to 85°C
operating temperature range are assured by design, characterization and correlation with Statistical
Quality Controls (SQC).
2. Designer test specifications.
Rev. 1.00
3
September 02, 2011
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