Datasheet

MAX17598/MAX17599
Low I
Q
, Wide-Input Range, Active Clamp
Current-Mode PWM Controllers
11Maxim Integrated
Pin Description
Pin Configuration
PIN NAME FUNCTION
1 DT
Dead-Time Programming Resistor Connection. Connect resistor from DT to GND to set the desired
dead time between the NDRV and AUXDRV signals. See the Dead Time section to calculate the
resistor value for a particular dead time.
2 SLOPE
Slope Compensation Programming Input. A resistor RSLOPE connected from SLOPE to SGND
programs the amount of internal slope compensation. Shorting this pin to SGND sets a default slope
compensation of 50mV/Fs.
3 RT
Switching Frequency Programming Resistor Connection. Connect resistor from RT to SGND to set the
PWM switching frequency.
4 DITHER/SYNC
Frequency Dithering Programming or Synchronization Connection. For spread-spectrum frequency
operation, connect a capacitor from DITHER to SGND and a resistor from DITHER to RT. To
synchronize the internal oscillator to the externally applied frequency, connect DITHER/SYNC to the
synchronization pulse.
5 COMP
Transconductance Amplifier Output. Connect the frequency compensation network between COMP
and SGND in nonisolated applications and between COMP and FB pins in isolated applications.
6 FB Transconductance Error Amplifier Inverting Input
7 SS
Soft-Start/Soft-Stop Capacitor Pin for Forward/Flyback Regulator. Connect a capacitor from SS to
SGND to set the soft-start/soft-stop time interval.
8 SGND Signal Ground. Connect SGND to the signal ground plane.
9 CS
Current-Sense Input. Current-sense connection for average current-sense and cycle-by-cycle
current limit. Peak current limit trip voltage is 350mV (typ).
10 PGND Power Ground. Connect PGND to the power ground plane.
15
16
14
13
5
6
7
RT
DITHER/
SYNC
8
DT
PGND CS AUXDRV
13
V
IN
4
12 10 9
EN/UVLO
OVI
SGND
SS
FB
COMP
SLOPE NDRV
2
11
V
DRV
EP
TQFN
MAX17598
MAX17599
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