TL384XB Datasheet, PDF (6/21 Pages) Texas Instruments – HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS

TL284xB, TL384xB
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
SLVS610A – AUGUST 2006 – REVISED SEPTEMBER 2006
www.ti.com
Error-Amplifier Section Electrical Characteristics
V_CC = 15 V⁽¹⁾, R_T = 10 kΩ, C_T = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
PARAMETER
TEST CONDITIONS
TL284xB
MIN TYP⁽²⁾
MAX
TL384xB
MIN TYP⁽²⁾
UNIT
MAX
Feedback input voltage
COMP = 2.5 V
2.45
2.5
2.55
2.42
2.5
2.58 V
Input bias current
–0.3
–1
–0.3
–2 µA
Open-loop voltage
amplification
V_O = 2 V to 4 V
65
90
65
90
dB
Gain-bandwidth product
0.7
1
0.7
1
MHz
Supply-voltage rejection ratio V_CC = 12 V to 25 V
Output sink current
VFB = 2.7 V, COMP = 1.1 V
60
70
2
6
60
70
dB
2
6
mA
Output source current
VFB = 2.3 V, COMP = 5 V
–0.5
–0.8
–0.5
–0.8
mA
High-level output voltage
Low-level output voltage
VFB = 2.3 V,
R_L = 15 kΩ to GND
VFB = 2.7 V,
R_L = 15 kΩ to GND
5
6
0.7
1.1
5
6
V
0.7
1.1 V
(1) Adjust V_CC above the start threshold before setting it to 15 V.
(2) All typical values are at T_J = 25°C.
Current-Sense Section Electrical Characteristics
V_CC = 15 V⁽¹⁾, R_T = 10 kΩ, C_T = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
PARAMETER
TEST CONDITIONS
TL284xB
MIN TYP⁽²⁾
MAX
TL384xB
MIN TYP⁽²⁾
UNIT
MAX
Voltage amplification⁽³⁾⁽⁴⁾
2.85
3
3.15
2.85
3
3.15 V/V
Current-sense comparator
threshold ⁽³⁾
COMP = 5 V
0.9
1
1.1
0.9
1
1.1 V
Supply-voltage rejection
ratio ⁽³⁾
V_CC = 12 V to 25 V
70
70
dB
Input bias current
–2
–10
–2
–10 µA
Delay time to output
VFB = 0 V to 2 V
150
300
150
300 ns
(1) Adjust V_CC above the start threshold before setting it to 15 V.
(2) All typical values are at T_J = 25°C.
(3) Measured at the trip point of the latch, with VFB at 0 V.
(4) Measured between I_SENSE and COMP, with the input changing from 0 V to 0.8 V.
6
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