lm5037mtx National Semiconductor Corporation, lm5037mtx Datasheet - Page 19

• Manufacturer Part Number: lm5037mtx
• Description: Dual-mode Pwm Controller With Alternating Outputs
• Manufacturer: National Semiconductor Corporation

For example, if the LM5037 is to be enabled when V
reaches 33V, and disabled when V
should be 113 kΩ, and R2 should be 4.42 kΩ. The voltage at
the UVLO pin should not exceed 7V at any time. Be sure to
check both the power and voltage rating (0603 resistors can
be rated as low as 50V) for the selected R1 resistor. To main-
HICCUP MODE CURRENT LIMIT RESTART (RES)
The basic operation of the hiccup mode current limit is de-
scribed in the functional description. The delay time to the
PWR
FIGURE 15. Remote Standby and Disable Control
decreases to 30V, R1
FIGURE 14. Basic UVLO Configuration
PWR
19
tain the UVLO threshold accuracy, a resistor tolerance of 1%
or better is recommended.
Remote control of the LM5037 operational modes can be ac-
complished with open drain device(s) connected to the UVLO
pin as shown in Figure 15.
initiation of a hiccup cycle is programmed by the selection of
the RES pin capacitor C
30069439
RES
as illustrated in Figure 16.
30069440
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