MAX15001 Maxim Integrated Products, MAX15001 Datasheet - Page 4

• Manufacturer Part Number: MAX15001
• Description: (MAX15000 / MAX15001) Current-Mode PWM Controllers
• Manufacturer: Maxim Integrated Products

Current-Mode PWM Controllers with
Programmable Switching Frequency
ELECTRICAL CHARACTERISTICS (continued)
(V
= 7.5k
COMP = open, V
(V
4
Note 1: All devices are 100% tested at T
Note 2: The MAX15000 is intended for use in universal input power supplies. The internal clamp circuit at IN is used to prevent the
Note 3: V
Note 4: The oscillator in the MAX1500_A is capable of operating up to 2500kHz. However, the NDRV switching frequency is limited
OSCILLATOR
Oscillator Frequency Range
Oscillator Frequency Accuracy
NDRV Switching Frequency
(Note 4)
Maximum Duty Cycle
IN
UVLO/EN
21.8
21.7
21.6
21.5
21.4
21.3
_______________________________________________________________________________________
= +12V (for MAX15000, bring V
-40
MAX15000 V
(MAX1500_B), R15 = 1k , C6 = 100nF (see the Typical Application Circuit), NDRV = open, V
bootstrap capacitor (C1 in Figure 1) from charging to a voltage beyond the absolute maximum rating of the device when
UVLO/EN is low (shutdown mode). Externally limit the maximum current to IN (hence to clamp) to 2mA maximum when
UVLO/EN is low. Clamp currents higher than 2mA may result in a clamp voltage higher than 30V, thus exceeding the
absolute maximum rating for IN. For the MAX15001, do not exceed the 24V maximum operating voltage of the device.
to operate up to 625kHz. Thus, the oscillator frequency for MAX1500_A must be limited to 1250kHz (maximum).
BOOTSTRAP UVLO WAKE-UP LEVEL
REF
PARAMETER
= +1.4V, V
-15
is measured with FB connected to COMP (see the Functional Diagram).
vs. TEMPERATURE
CS
IN
TEMPERATURE ( C)
RISING
= 0V, T
10
FB
= +1V, COMP = open, V
35
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
60
IN
SYMBOL
up to 23.6V for startup), 10nF bypass capacitors at IN and V
85
D
f
f
OSC
A
MAX
SW
= +85°C. All limits over temperature are guaranteed by characterization.
10.3
10.1
CS
9.9
9.7
9.5
9.3
f
f
MAX1500_A, f
MAX1500_B, f
MAX1500_A
MAX1500_B
OSC
OSC
-40
= 0V, T
BOOTSTRAP UVLO SHUTDOWN LEVEL
MAX15000 V
= 200kHz to 800kHz
= 50kHz to 2500kHz
-15
A
vs. TEMPERATURE
= +25°C, unless otherwise noted.)
IN
TEMPERATURE ( C)
CONDITIONS
FALLING
SW
SW
10
= f
= f
OSC
OSC
Typical Operating Characteristics
35
/2
/4
60
85
A
1.236
1.234
1.232
1.230
1.228
1.226
1.224
= +25°C.) (Note 1)
12.5
MIN
-10
-20
50
25
-40
CC
UVLO/EN RISING
UVLO/EN WAKE-UP THRESHOLD
, R12 = 15k
UVLO/EN
-15
TYP
vs. TEMPERATURE
50
75
TEMPERATURE ( C)
10
= +1.4V, V
(MAX1500_A), R12
625.0
MAX
2500
35
+10
+20
625
FB
60
= +1.0V,
UNITS
kHz
kHz
%
%
85