max5974 Maxim Integrated Products, Inc., max5974 Datasheet - Page 9

• Manufacturer Part Number: max5974
• Description: Active-clamped, Spread-spectrum, Current-mode Pwm Controllers
• Manufacturer: Maxim Integrated Products, Inc.

(V
V
GND
IN
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
= 12V (for MAX5974A/MAX5974C, bring V
, V
-40
EN
= 2V, NDRV = AUXDRV = SS = COMP = unconnected, R
MAX5974A/MAX5974B
-15
TRANSCONDUCTANCE
vs. TEMPERATURE
MAX5974C/MAX5974D
TEMPERATURE (°C)
10
SHUTDOWN RESPONSE
ENABLE RESPONSE
35
100µs/div
1ms/div
60
Active-Clamped, Spread-Spectrum,
85
MAX5974A/B/C/D toc31
MAX5974A/B/C/D toc33
MAX5974C
Current-Mode PWM Controllers
IN
Typical Operating Characteristics (continued)
25
20
15
10
5
0
up to 21V for startup), V
V
2V/div
V
20V/div
V
20V/div
V
5V/div
V
2V/div
V
10V/div
V
10V/div
V
5V/div
2.44
EN
NDRV
AUXDRV
OUT
EN
NDRV
AUXDRV
OUT
TRANSCONDUCTANCE HISTOGRAM
2.46
2.48
(MAX5974A/MAX5974B)
TRANSCONDUCTANCE (mS)
2.50
2.52
2.54
RT
2.56
= 34.8kI, R
2.58
CS
2.60
= V
SHUTDOWN RESPONSE
V
2.62
SS
CSSC
2.64
RAMP RESPONSE
DT
10µs/div
4µs/div
= 25kI, unless otherwise noted. )
= V
DITHER/SYNC
25
20
15
10
5
0
MAX5974A/B/C/D toc32
MAX5974A/B/C/D toc34
2.56
TRANSCONDUCTANCE HISTOGRAM
2.58
2.60
(MAX5974C/MAX5974D)
TRANSCONDUCTANCE (mS)
= V
2.62
V
2V/div
V
10V/div
V
10V/div
V
5V/div
V
2V/div
V
10V/div
V
10V/div
SS
NDRV
AUXDRV
EN
NDRV
AUXDRV
OUT
FB
2.64
= V
2.66
FFB
2.68
2.70
= V
2.72
DCLMP
2.74
2.76
=
9