MAX5094DAUA+ Maxim Integrated Products, MAX5094DAUA+ Datasheet - Page 11

• Manufacturer Part Number: MAX5094DAUA+
• Description: IC CNTRLR PWM CURRENT MD 8-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX5094DAUA+

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 50%
• Voltage - Supply: 8 V ~ 25 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: Yes
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Frequency-max: 1MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. MAX5094_ Functional Diagram
The MAX5094_/MAX5095_ current-mode PWM con-
trollers are designed for use as the control and regulation
core of flyback or forward topology switching power sup-
plies. These devices incorporate an integrated low-side
driver, adjustable oscillator, error amplifier (MAX5094_
only), current-sense amplifier, 5V reference, and external
synchronization capability (MAX5095A/MAX5095B only).
An internal +26.5V current-limited V
overvoltage during startup.
Eight different versions of the MAX5094/MAX5095 are
available as shown in the Selector Guide. The
MAX5094A/MAX5094B are the standard versions with a
High-Performance, Single-Ended, Current-Mode
COMP
GND
CS
FB
3
5
2
1
MAX5094_
VEA
______________________________________________________________________________________
Detailed Description
0.3V (MAX5094C/D)
1V (MAX5094A/B)
CC
2R
EN-DRV-BAR
clamp prevents
ILIM
R
CPWM
DELAY
REFERENCE
2.5V
2.5V
2.5V
REG_OK
feedback input (FB) and internal error amplifier. The
MAX5095A/MAX5095B include bidirectional synchroniza-
tion (SYNC). This enables multiple MAX5095A/
MAX5095Bs to be connected and synchronized to the
device with the highest frequency. The MAX5095C
includes an ADV_CLK output, which precedes the
MAX5095C’s drive output (OUT) by 110ns. Figures 1, 2,
and 3 show the internal functional diagrams of the
MAX5094_, MAX5095A/MAX5095B, and MAX5095C,
respectively. The MAX5094A/MAX5094C/MAX5095A are
capable of 100% maximum duty cycle. The MAX5094B/
MAX5094D/MAX5095B/MAX5095C limit the maximum
duty cycle to 50%.
OSC Q
PREREGULATOR
VP
5V
CLK
SHUTDOWN
THERMAL
S
R
PWM Controllers
Q
EN-REF
BG
SNS
100% MAX DUTY CYCLE (MAX5094A/MAX5094C)
50% MAX DUTY CYCLE (MAX5094B/MAX5094D)
VP
UVLO
5V REGULATOR
VOLTAGE-
DIVIDER
8.4V/7.6V
V
DD
VOLTAGE-
DIVIDER
26.5V
7
8
6 OUT
4 R
V
REF
CC
T
/C
T
11