MAX8540EEE+ Maxim Integrated Products, MAX8540EEE+ Datasheet - Page 7

• Manufacturer Part Number: MAX8540EEE+
• Description: IC PWM CTRLR CURR-MODE 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX8540EEE+

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 82%
• Voltage - Supply: 7.6 V ~ 18 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: Yes
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-QSOP
• Frequency-max: 1MHz
• Duty Cycle (max): 80 %
• Mounting Style: SMD/SMT
• Switching Frequency: 200 KHz to 1000 KHz
• Maximum Operating Temperature: + 85 C
• Fall Time: 53 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 57 ns
• Synchronous Pin: Yes
• Topology: Flyback, Forward
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
Voltage-Mode PWM Controllers for Isolated Supplies
CC
1000
800
600
400
200
0
= 12V, T
7.6
9.7
V
V
A
SKTON
SKTOFF
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
V
vs. INPUT VOLTAGE
DRV
= +25°C, unless otherwise specified.)
R
FREQ
INPUT VOLTAGE (V)
LATCH-OFF OVERCURRENT WAVEFORMS
FREQUENCY
Synchronizable, High-Frequency Current- and
0
11.8
R
R
= 50kΩ
_______________________________________________________________________________________
FREQ
FREQ
2
= 10kΩ
= 20kΩ
13.8
REFERENCE VOLTAGE
vs. LOAD CURRENT
LOAD CURRENT (mA)
4
15.9
10ms/div
6
18.0
C
8
SKTON
= 0.01µF
MAX8540 toc15
10
1000
Typical Operating Characteristics (continued)
800
600
400
200
0
12
0
1V/div
5V
0.2
SKTON/SKTOFF TIME
vs. CAPACITANCE
CAPACITANCE (µF)
0.4
0.6
0.8
V
V
SKTON
SKTOFF
5.06
5.04
5.02
5.00
4.98
4.96
4.94
V
DRV
HICCUP-MODE OVERCURRENT WAVEFORMS
1.0
7.6
REFERENCE VOLTAGE vs. V
V
9.7
V
DRV
CS
PROGRAMABLE LATCH-OFF DELAY
11.8
V
4ms/div
C
CC
SKTON
(V)
13.8
, C
SKTFOF
4ms/div
15.9
MAX8540 toc16
= 0.01µF
CC
C
SKTON
18.0
1V/div
1V/div
= 0.01µF
MAX8540 toc12
2V/div
7