MAX5068BAUE+T Maxim Integrated Products, MAX5068BAUE+T Datasheet - Page 4

• Manufacturer Part Number: MAX5068BAUE+T
• Description: IC CNTRLR PWM CRNT MD 16TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5068BAUE+T

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1.25MHz
• Duty Cycle: 50%
• Voltage - Supply: 10.8 V ~ 24 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Frequency-max: 1.25MHz
• Duty Cycle (max): 50 %
• Output Current: 1000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 25 KHz to 1250 KHz
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: Yes
• Topology: Flyback, Forward
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
C
High-Frequency, Current-Mode PWM Controller
with Accurate Programmable Oscillator
Note 1: The MAX5068 is 100% tested at T
Note 2: The MAX5068A/B are intended for use in universal-input power supplies. The internal clamp circuit is used to prevent the
Note 3: Reference voltage (V
Note 4: The SYNC frequency must be at least 25% higher than the programmed oscillator frequency.
Note 5: The internal oscillator clock cycle.
Note 6: The MAX5068A/B driver switching frequency is one-half of the oscillator frequency. The MAX5068C/D/E/F driver switching
4
NDRV Switching Frequency
RT Voltage
Oscillator Accuracy
Maximum Duty Cycle
DEAD-TIME CONTROL (DT)
Dead Time
Dead-Time Disable Voltage
Dead-Time Regulation Voltage
INTEGRATING FAULT PROTECTION (FLTINT)
FLTINT Source Current
FLTINT Shutdown Threshold
FLTINT Restart Threshold
SLOPE COMPENSATION (SCOMP) MAX5068C/D/E/F Only
Slope Compensation
Slope-Compensation Range
Slope-Compensation Voltage
Range
VCC
IN
_______________________________________________________________________________________
= +12V for the MAX5068B/E/F; V
= 1µF; R
bootstrap capacitor (C1 in Figure 1) from charging to a voltage beyond the absolute maximum rating of the device when
UVLO/EN is low. The maximum current to V
ly limited to 2mA. Clamp currents higher than 2mA may result in clamp voltages higher than 30V, thus exceeding the
absolute maximum rating for V
frequency is one-quarter of the oscillator frequency.
PARAMETER
RT
= 100kΩ; NDRV = floating; T
REF
) is measured with FB connected to COMP (see the Functional Diagram).
V
V
V
SYMBOL
D T_D IS ABLE
V
FLTINT_SD
FLTINT_RS
V
V
IN
I
SLOPER
D
FLTINT
SCOMP
IN
SLOPE
V
f
V
t
SW
MAX
DT
. For the MAX5068C/D, do not exceed the 24V maximum operating voltage of the device.
= +23.6V for the MAX5068A/C/D at startup, then reduces to +12V; C
RT
DT
A
= +25°C. All limits over temperature are guaranteed by design.
A
= T
(Note 6)
40kΩ < R
T
T
DT connected to
REG5
R
V
V
V
C
MIN
A
A
DT
FLTINT
FLTINT
FLTINT
SLOPE
IN
= +25°C
= - 40° C to + 125° C
= 24.9kΩ
to T
(hence to clamp) when UVLO is low (device is in shutdown) must be external-
= 0
rising
falling
MAX
= 100pF, R
RT
, unless otherwise noted. Typical values are at T
< 500kΩ
CONDITIONS
RT
= 110kΩ
f
MAX5068A/B
f
MAX5068C/D/E/F
f
f
f
f
MAX5068A/B
MAX5068C/D/E/F
SW
SW
OSC
OSC
OSC
OSC
= 10
= 10
≤ 500kHz
> 500kHz
≤ 500kHz
> 500kHz
11
11
/(2 x R
/(4 x R
RT
RT
),
),
V
- 0.5V
12.5
MIN
-2.5
-4.5
REG5
25
-4
-6
0
0
A
TYP
1.23
2.0
2.8
1.6
50
75
60
60
15
= +25°C.) (Note 1)
IN
= C
MAX
1250
+2.5
+4.5
625
2.7
+4
+6
90
REG5
= 0.1µF;
UNITS
mV/µs
mV/µs
kHz
kHz
µA
ns
%
%
V
V
V
V
V
V