ISL6721_07 Datasheet, PDF (6/21 Pages) Intersil Corporation – Flexible Single Ended Current Mode PWM Controller

ISL6721
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematicon page 2 and page 3. 9V < V_CC = V_C < 20V, R_T = 11kΩ, Ct = 330 pF, T_A = -40 to +105°C (Note 3),
Typical values are at T_A = +25°C (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Gain, A_CS
ERROR AMPLIFIER
V_SLOPE = 0V, V_FB = 2.3V,
V_ISET = 0.35V, 1.5V
A_CS = ΔISET/ΔISENSE
0.77
0.79
0.81
V/V
Open Loop Voltage Gain
(Note 5)
60
90
-
dB
Gain-Bandwidth Product
(Note 5)
-
15
-
MHz
Reference Voltage Initial Accuracy
Reference Voltage
COMP to PWM Gain, A_COMP
COMP to PWM Offset
V_FB = COMP, T_A = +25°C (Note 5) 2.465
2.515
2.565
V
V_FB = COMP
2.44
2.515
2.590
V
COMP = 4V, T_A = +25°C
0.31
0.33
0.35
V/V
COMP = 4V (Note 5)
0.51
0.75
0.88
V
FB Input Bias Current
COMP Sink Current
COMP Source Current
COMP VOH
COMP VOL
PSRR
V_FB = 0V
COMP = 1.5V, V_FB = 2.7V
COMP = 1.5V, V_FB = 2.3V
V_FB = 2.3V
V_FB = 2.7V
Frequency = 120Hz (Note 5)
-2
0.1
2
μA
2
6
-
mA
-0.25
-0.5
-
mA
4.25
4.4
5.0
V
0.4
0.8
1.2
V
60
80
-
dB
SS Clamp, V_COMP
OSCILLATOR
SS = 2.5V, V_FB = 0V, ISET = 2V
2.4
2.5
2.6
V
Frequency Accuracy
289
318
347
kHz
Frequency Variation with V_CC
Temperature Stability
T = +105°C (f_20V - f_9V)/f_9V
T = -40°C (f_20V -f_9V)/f_9V
(Note 5)
-
2
3
%
2
3
-
8
-
%
Maximum Duty Cycle
(Note 6)
68
75
81
%
Comparator High Threshold - Free Running
-
3.00
-
V
Comparator High Threshold - with External SYNC (Note 5)
-
4.00
-
V
Comparator Low Threshold
-
1.50
-
V
Discharge Current
0 to +105°C
-40 to +105°C
0.75
1.0
1.2
mA
0.70
1.0
1.2
SYNCHRONIZATION
Input High Threshold
-
-
2.5
V
Input Pulse Width
25
-
-
nS
Input Frequency Range
(Note 5)
0.65 x Free
-
Running
1.0
MHz
Input Impedance
-
4.5
-
kΩ
VOH
VOL
SYNC Advance
Output Pulse Width
R_LOAD = 4.5kΩ
2.5
-
-
V
R_LOAD = open
-
-
0.1
V
SYNC rising edge to GATE falling
-
edge, C_GATE = C_SYNC = 100pF
25
55
ns
C_SYNC = 100pF
50
-
-
ns
6
FN9110.4
April 13, 2007