Product # PQ24120QGA08
Phone 1-888-567-9596
Doc.# 005-2QG212D_A
3/1/02
Page 3
Technical Specification
24Vin 12Vout 8.3A
Quarter
Brick
PARAMETER
NOTES and CONDITIONS
PQ24120QGA08
Min.
Typ.
Max.
Units
INPUT CHARACTERISTICS
Operating Input Voltage Range
18
24
36
V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
15.5
16.0
16.5
V
Turn-Off Voltage Threshold
14.0
14.5
15.0
V
Lockout Hysteresis Voltage
1.0
1.5
2.0
V
Maximum Input Current
100% Load, 18Vin
6.3
A
No-Load Input Current
160
320
mA
Off Converter Input Current
1.6
3
mA
Input Reflected-Ripple Current
P-P thru 3.3H inductor; Figures 13 & 15
10
mA
OUTPUT CHARACTERISTICS
Output Voltage Set Point
11.82
12.00
12.18
V
Output Voltage Regulation
Over Line
+0.05 (5)
+0.2 (24) % (mV)
Over Load
+0.05 (5)
+0.2 (24) % (mV)
Over Temperature
+90
+240
mV
Total Output Voltage Range
over sample line, load and temperature
11.58
12.42
V
Output Voltage Ripple and Noise
20MHz bandwidth; Figures 13 & 16
Peak-to-Peak
Full Load, 1F ceramic, 10F tantalum
80
160
mV
RMS
Full Load, 1F ceramic, 10F tantalum
20
40
mV
Operating Output Current Range
0
8.33
A
Output DC Current-Limit Inception
Output Voltage 10% Low; Fig. 17 & 18
9
9.6
11
A
Short-Circuit Protection (redundant shutdown)
16
18
20
A
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
120 Hz; Figure 20
60
dB
Output Voltage Current Transient
470F load cap, 5A/s; Figure 12
Positive Step Change in Output Current
50% Io to 75% Io
500
mV
Negative Step Change in Output Current
75% Io to 50% Io
550
mV
Settling Time to within 1% Vout nominal
400
s
Turn-On Transient
Turn-On Time
Full load, Vout=90% nom.; Figs 9 & 10
4
8
12
ms
Start-Up Inhibit Period
-40°C to +125°C; Figure F
180
200
215
ms
Maximum Output Capacitance
Full load; 5% overshoot of Vout at startup
2,000
F
EFFICIENCY
100% Load
Figure 1
88
%
50% Load
88
%
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Plastic Package rated to 150°C
125
°C
Board Temperature
Board rated to 165°C
125
°C
Transformer Temperature
Figures 5 - 8
125
°C
ISOLATION CHARACTERISTICS
Isolation Voltage
2000
V
Isolation Resistance
10
M
Isolation Capacitance
470
pF
FEATURE CHARACTERISTICS
Switching Frequency
280
300
320
kHz
ON/OFF Control (Option P)
Off-State Voltage
-2
0.8
V
On-State Voltage
2.4
18
V
ON/OFF Control (Option N)
Off-State Voltage
2.4
18
V
On-State Voltage
-2
0.8
V
ON/OFF Control (Either Option)
Pull-Up Voltage
See circuit diagram; Figure B
Vin/3
9.6
V
Pull-Up Resistance
Pull up to Vin/3
33
k
Output Voltage Trim Range
Across Pins 8 & 4; Figures C & D
-20
+10
%
Output Over-Voltage Protection
Over full temp range; % of nominal Vout
117
122
127
%
Over-Temperature Shutdown
Average PCB Temperature
125
°C
PQ24120QGA08 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=24Vdc, nominal Vout unless otherwise noted; full operating temperature range is -40°C to
+115°C ambient temperature with appropriate power derating. Specifications subject to change without notice.
Patents: SynQor is protected under various patents, including but not limited to U.S. Patent # 5,999,417.