MAX5974DETE+ Maxim Integrated Products, MAX5974DETE+ Datasheet - Page 11

• Manufacturer Part Number: MAX5974DETE+
• Description: Current Mode PWM Controllers ACTIVE-CLAMPED CUR MODE PWM CONTLR
• Manufacturer: Maxim Integrated Products

Specifications of MAX5974DETE+

• Duty Cycle (max): 82 %
• Mounting Style: SMD/SMT
• Switching Frequency: 600 KHz
• Operating Supply Voltage: 12 V to 21 V
• Supply Current: 1.8 mA
• Maximum Operating Temperature: + 85 C
• Fall Time: 14 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 27 ns
• Package / Case: TQFN-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN
1
2
3
4
5
DITHER/
NAME
COMP
SYNC
FFB
DT
RT
Dead-Time Programming Resistor Connection. Connect resistor R
desired dead time between the NDRV and AUXDRV signals. See the Dead Time section to calcu-
late the resistor value for a particular dead time.
Frequency Dithering Programming or Synchronization Connection. For spread-spectrum frequency
operation, connect a capacitor from DITHER to GND and a resistor from DITHER to RT. To syn-
chronize the internal oscillator to the externally applied frequency, connect DITHER/SYNC to the
synchronization pulse.
Switching Frequency Programming Resistor Connection. Connect resistor R
set the PWM switching frequency. See the Oscillator/Switching Frequency section to calculate the
resistor value for the desired oscillator frequency.
Frequency Foldback Threshold Programming Input. Connect a resistor from FFB to GND to set the
output average current threshold below which the converter folds back the switching frequency to
1/2 of its original value. Connect to GND to disable frequency foldback.
Transconductance Amplifier Output and PWM Comparator Input. COMP is level shifted down and
connected to the inverting input of the PWM comparator.
Active-Clamped, Spread-Spectrum,
TOP VIEW
Current-Mode PWM Controllers
DCLMP
EN
SS
IN
13
14
15
16
+
12
1
THIN QFN
MAX5974A
MAX5974B
MAX5974C
MAX5974D
11
2
10
3
FUNCTION
EP
9
4
8
7
6
5
CSSC
GND
FB
COMP
DT
from DT to GND to set the
Pin Configuration
Pin Description
RT
from RT to GND to
11