MAX8540EEE+ Maxim Integrated Products, MAX8540EEE+ Datasheet - Page 5

• 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

ELECTRICAL CHARACTERISTICS (continued)
(V
R
unless otherwise noted.) (Note 5)
Note 1: This is the V
Note 2: Guaranteed by design.
Note 3: See the SKTON and SKTOFF section.
Note 4: The minimum FREQ pulse must be 200ns in duration with a minimum magnitude of 3V plus V
Note 5: Specifications to -40°C are guaranteed by design and not production tested.
EN
Input Threshold
Pullup Current
CURRENT LIMIT
V
CS Current Limit to DRV Delay
V
ILIM Leakage Current
Hiccup Skip Off-Charging Current
Hiccup Skip On-Charging Current
Hiccup SKTOFF Voltage Threshold
DUTY CYCLE
Duty-Cycle Range
Maximum Duty Cycle
SOFT-START
Source Current
Pulldown Resistance in Shutdown
FREQUENCY
Initial Accuracy
SYNC (EXTERNAL FREQUENCY SYNCHRONIZATION)
Frequency Range
FREQ Input Threshold
Voltage-Mode PWM Controllers for Isolated Supplies
PRAMP
VCC
CS
ILIM
C ycl e- b y- C ycl e Thr eshol d V ol tag e
= 12V, C
Range
have a maximum duty cycle of 55%.
= 25kΩ, C
PARAMETER
REF
Synchronizable, High-Frequency Current- and
SKTON
= 1µF, V
CC
_______________________________________________________________________________________
operating range after clearing the rising UVLO.
= 0.01µF, C
UV
= V
OV
SKTOFF
= 2V, R
V
V
V
Includes leading-edge blanking time
Accuracy when V
V
V
Internal programmed max duty at all frequencies
V
I
R
Frequency syncs ±30% of frequency set by
external R on FREQ pin
(Note 4)
SS
IL
IH
ILIM
UV
SS
FREQ
EN
= 10mA, V
= 1.3V
= 1V
= 0.1µF, V
= 2.6V
FREQ/SYNC
= 1.250V
= 32.4kΩ
EN
OPTO
= 32.4kΩ, C
ILIM
= 3V
CONDITIONS
= 2V, V
= 0.075V
ILIM
SS
= 0.1µF, R
= 4V, V
CS
MAXDTY
= 0.6V, C
= 97.6kΩ, V
0.075
1.130
MIN
280
2.6
0.9
1.5
2.3
4.5
0.2
15
79
-1
5
2
DRV
F
= 10pF, T
of the external diode and
TYP
±10
EN
= 0, R
A
= -40°C to +85°C,
1.375
MAX
1.25
150
320
1.2
2.1
3.5
2.7
6.5
1.0
+1
80
82
30
SCOMP
3
= 68kΩ,
UNITS
M H z
kHz
µA
µA
µA
µA
µA
ns
%
%
%
Ω
V
V
V
V
V
5