Datasheet

OUTB
OUTA
COMP
Slope
Compensation
CLK
OUTPUT
CS
RAMP
OUTA
OUTB
cs
C
slope
C
filter
R
filter
Rcs
LM25037
RAMP
CLK + LEB
CLK
Current
Sense
V
REF (5V)
R
slope
LM25037, LM25037-Q1
SNVS572D –JULY 2008–REVISED MARCH 2013 www.ti.com
Figure 18. Current Mode Configuration with Slope Compensation
Figure 19. Timing Diagram for Current Mode Configuration
OSCILLATOR
The LM25037 oscillator frequency and the maximum duty cycle are set by two external resistors connected
between the RT1 and RT2 pins to AGND. The minimum dead-time between OUTA and OUTB pulses is
proportional to the RT2 resistor value and the overall oscillator frequency is inversely proportional to RT1 and
RT2 resistor values. Each output switches at half the oscillator frequency. Initially, RT2 should be selected for the
desired dead-time or for the desired maximum duty cycle (D
max
).
14 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated
Product Folder Links: LM25037 LM25037-Q1