Rainbow Electronics MAX5069 - Manual (Page 7)

MAX5069
High-Frequency, Current-Mode PWM Controller
with Accurate Oscillator and Dual FET Drivers
_______________________________________________________________________________________ 7
62.0
62.9
62.8
62.7
62.6
62.5
62.4
62.3
62.2
62.1
63.0
-40 35 60 -15 10 85 110
FLTINT CURRENT vs. TEMPERATURE
MAX5069 toc19
TEMPERATURE (°C)
FLTINT CURRENT
(µ
A)
8.0
12.5
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
13.0
-40 35 60 -15 10 85 110
HYST R ON vs. TEMPERATURE
MAX5069 toc20
TEMPERATURE (°C)
R
ON
(Ω
)
V IN = 24V
SINKING 50mA
0.01
0.1
1
2
0.03 0.1 1 2
NDRVA SWITCHING FREQUENCY (f
SW)
vs. R
RT
MAX5069 toc21
R RT (MΩ)
f SW
(MHz)
NDRV SWITCHING FREQUENCY
vs. TEMPERATURE
MAX5069 toc22
TEMPERATURE (°C)
NDRV SWITCHING FREQUENCY (kHz)
110 85 35 60 10 -15
48.4
48.8
49.2
49.6
50.0
50.4
50.8
51.2
51.6
52.0
48.0
-40
f SW = 50kHz
NDRV SWITCHING FREQUENCY
vs. TEMPERATURE
MAX5069 toc23
TEMPERATURE (°C)
NDRV SWITCHING FREQUENCY (kHz)
100 125 75 50 25 0 -25
497
496
498
500
499
502
501
504
503
505
495
-50
f SW = 500kHz f SW = 500kHz
DEAD TIME vs. TEMPERATURE
MAX5069 toc25
TEMPERATURE (°C)
TIME (ns)
110 85 60 35 10 -15
45
50
55
60
65
70
40
-40
V IN = 24V
R DT = 24.9kΩ
R RT = 100kΩ
NDRV SWITCHING FREQUENCY
vs. TEMPERATURE
MAX5069 toc24
TEMPERATURE (°C)
NDRV SWITCHING FREQUENCY (kHz)
110 85 60 35 10 -15
1.15
1.20
1.25
1.30
1.35
1.40
1.10
-40
f SW = 1.25MHz
DEAD TIME vs. R DT
MAX5069 toc26
R
DT
(kΩ)
TIME (ns)
10
20
40
60
80
100
120
140
160
180
200
0
1 100
Typical Operating Characteristics (continued)
(V
IN
= +23.6V for MAX5069A/B at startup, then reduces to +12V, V
IN
= +12V for the MAX5069C/D, C
IN
= C
REG5
= 0.1µF, C
VCC
= 1µF,
R RT = 100kΩ, NDRV_ = floating, V FB = 0V, V COMP = floating, V CS = 0V, T A = +25°C, unless otherwise noted.)