FAN8048 查看數據表（PDF） - Fairchild Semiconductor
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FAN8048 Datasheet PDF : 34 Pages
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FAN8048
Electrical characteristics (Continued)
(PVCC=VIN=2.4V, VSYS1=VSYS2=2.7V, VG=7.0V, DCIN=0V, CPCT=470pF, Ta=25°C,unless otherwise specifid)
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
VSYS2 OPTION CIRCUIT
VSYS2 voltage at buck mode
operation
VBUCK
VIN=2.4V, VSYS2=1.8V
ISYS2=100mA
-
1.8
-
V
Load stability of VSYS2 at buck
mode operation
VLS
VIN=2.4V, VSYS2=1.8V
ISYS2=0 → 100mA
-30
0
30 mV
OSCILLATOR (PCT)
Source current
Sink current
ISOURCE
-
ISINK
-
34
42
50 µA
11
14
17 µA
Oscillation frequency1
Oscillation frequency2
FOSC1
FOSC2
No CLK, At self oscillation
CLK=88.2kHz,
At synchronization mode
45
60
75 KHz
85.2 88.2 91.2 KHz
Maximum duty ratio (Note1)
OUTPUT SWITCHES
DMAX CLK=88.2kHz
75
%
On resistance of upper switch RONSWU Switch A and D, ISYS=500mA
-
On resistance of lower switch
RONSWL Switch B and C, ISYS=500mA
-
Leakage current of upper switch ILSWU Switch A and D
-
Leakage current of lower switch ILSWL Switch B and C
-
0.4 0.6 Ω
0.4 0.6 Ω
0
2 µA
0
2 µA
POWER-ON RESET
RST threshold voltage1
Hysteresis voltage1
RST threshold voltage2
Hysteresis voltage2
VRST1 VIN=2.4V, VSYS2=1.0 → 1.8V 1.20
∆VRST1 VIN=2.4V, VSYS2=1.8 → 1.0V 40
VRST2 VSYS2=2.7V, VIN=1.0 → 1.8V 1.30
∆VRST2 VSYS2=2.7V, VIN=1.8 → 1.0V 50
1.35
70
1.45
80
1.50 V
100 mV
1.60 V
110 mV
CONTROL INPUT
System-on threshold voltage
VONTH VSYS1=VSYS2=0V
-
VIN -
0.65
V
System-on input low level voltage VONL
System-on input current
ION
VSYS1=VSYS2=0V
VON=0V
VIN -1.0 -
6
16
-
V
26 µA
System-off threshold voltage
VOFFTH
-
VSYS1-
V
1.15
System-off input low level voltage VOFFL
-
VSYS1-
1.4
-
V
System-off input current
IOFF
-
-85 -70 -55 µA
H-BRIDGE PWM DRIVER PART
(CH1)
Out on Resistance
Input Resistance
High level Input voltage
RON1
RIN1
VIH1
Top + bottom switches
-
-
-
2.0 3.0 Ω
-
50
- KΩ
2.2
-
-
V
Low level Input voltage
VIL1
-
Rising Time (Note1)
TRISE1
-
Falling Time (Note1)
TFALL1
-
-
-
0.5 V
-
0.2
-
µs
-
0.2
-
µs
Minimum Pulse Width (Note1)
TMIN1
-
-
300
-
ns
8
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